Normative Data of Handgrip Strength in Macedonian Children and Adolescents According to Chronological and Biological Age / Datos Normativos de la Fuerza de Prensión Manual en Niños y Adolescentes Macedonios Según la Edad Cronológica y Biológica

SUMMARY: The handgrip strength is used as a means of individual's health prediction during life. It is used as an indicator of the nutrition status, bone fragility, presence of sarcopenia and it correlates with certain diseases and clinical complications. The research goal was to analyze the results of the hand dynamometry test, based on the chronological and biological age, and to offer normative and referent standards about children and adolescents from the Republic of North Macedonia. The study was conducted on a sample of 4031 respondents of both sexes at the age 6-14 years. In order to achieve the research goals, the measured characteristics were of the weight, height, sitting height and handgrip strength. The body mass index and biological maturity values (APHV) were obtained by using formulas. On the basis of the obtained results, it can be concluded that statistically significant differences in handgrip strength are established between the boys and girls of all age categories. Also, statistically significant differences between boys and girls are established in the hand dynamometry test of all APHV levels. In general, the use of the APHV allows a better categorization of the performance of the studied children and adolescents. With boys, the correlation between the chronological age and test was 68 %, and with girls - 77 %. The normative referent standards of the hand dynamometry test are presented in percentiles for both sexes. Thye hand dynamometry test's results during childhood and adolescence should be analyzed and interpret on the basis of biological age, and not on the chronological age. These tools can help specialists who work with children and adolescents in ethnic and epidemiological context.

La fuerza de prensión se utiliza como medio para predecir la salud del individuo durante la vida. Se utiliza como indicador del estado nutricional, fragilidad ósea, presencia de sarcopenia y se correlaciona con determinadas enfermedades y complicaciones clínicas. El objetivo de la investigación fue analizar los resultados de la prueba de dinamometría manual, con base en la edad cronológica y biológica, y ofrecer estándares normativos y referentes sobre niños y adolescentes de la República de Macedonia del Norte. El estudio se realizó en una muestra de 4031 encuestados de ambos sexos con edades comprendidas entre 6 y 14 años. Para lograr los objetivos de la investigación, las características medidas fueron el peso, la altura, la altura al sentarse y la fuerza de prensión. El índice de masa corporal y los valores de madurez biológica (APHV) se obtuvieron mediante fórmulas. Sobre la base de los resultados obtenidos, se puede concluir que se establecen diferencias estadísticamente significativas en la fuerza de prensión manual entre niños y niñas de todas las categorías de edad. Asimismo, se establecen diferencias estadísticamente significativas entre niños y niñas en la prueba de dinamometría manual de todos los niveles APHV. En general, el uso del APHV permite una mejor categorización del desempeño de los niños y adolescentes estudiados. En los niños, la correlación entre la edad cronológica y la prueba fue del 68 %, y en las niñas, del 77 %. Los estándares normativos referentes de la prueba de dinamometría manual se presentan en percentiles para ambos sexos. Los resultados de la prueba de dinamometría manual durante la infancia y la adolescencia deben analizarse e interpretarse en función de la edad biológica y no de la edad cronológica. Estas herramientas pueden ayudar a los especialistas que trabajan con niños y adolescentes en un contexto étnico y epidemiológico.

Asociación entre condición física y fase angular en el adulto mayor: Un estudio piloto

El diagnóstico por bioimpedancia (BIA) y el ángulo de fase (AnF), como indicador, permiten monitorear el estado físico, de salud y nutricional en adultos mayores. El objetivo de este estudio fue establecer la relación entre la condición física y valores de fase angular por bioimpedancia en un grupo de adultos mayores sedentarios. Participaron voluntariamente 24 adultos mayores sedentarios (21 mujeres y 3 hombres). A cada participante se les midió bioimpedancia, fuerza de presión manual y test de 6 minutos del Senior Fitness Test (SFT). Posteriormente se analizaron los resultados, correlacionando el ángulo de fase (AnF) y condición física cardiorrespiratoria según sexo y el AnF con la fuerza de presión manual. El 71% presentó una media de AnF por debajo de la referencia (4,5º ± 0,4), específicamente, el 67% de los hombres y el 62% de las mujeres. La correlación entre AnF y capacidad física cardiorrespiratoria arrojó un valor de R2= 0,50; p<0,0001. La asociación entre AnF y fuerza de presión manual fue de R2=0,35; p=0,0023. Se encontró una relación significativa entre una prueba de condición física cardiorrespiratoria y AnF y entre la fuerza de presión manual y AnF. Es de importancia clínica incluir parámetros objetivos de valoración celular en adultos mayores como el AnF.

The diagnosis by bioimpedance (BIA) and the phase angle (PhA) are indicators, that allow monitoring of the physical health and nutritional status of older adults. The objective of this study was to establish the relationship between physical fitness and phase angle values by bioimpedance in a group of sedentary older adults. 24 elderly sedentary volunteers participated (21 women and 3 men). Each participant underwent bioimpedance, manual dynamometry, and the 6-minute Senior Fitness Test (SFT). Subsequently, the results were analyzed, making a correlation between PhA and cardiorespiratory physical condition, another between PhA and cardiorespiratory physical condition according to sex and finally an association between PhA and handgrip strength. R71% presented a PhA mean below the reference (4.5º ± 0.4), specifically 67% of men and 62% of women. The correlation between PhA and cardiorespiratory fitness showed a value of R2= 0.50; p<0.0001. The association between PhA and handgrip strength was R2=0.35; p=0.0023. A significant relationship was found between a cardiorespiratory fitness test and PhA and between handgrip strength and PhA. It is of clinical importance to include objective cellular assessment parameters in older adults such as PhA.

O diagnóstico por bioimpedância (BIA) e ângulo de fase (AnF), como indicador, permitem monitorar o estado físico, de saúde e nutricional de idosos. O objetivo deste estudo foi estabelecer a relação entre a condição física e os valores da fase angular por bioimpedância em um grupo de idosos sedentários. Participaram voluntariamente 24 idosos sedentários (21 mulheres e 3 homens). Cada participante foi medido bioimpedância, força de pressão manual e teste de 6 minutos do Senior Fitness Test (SFT). Posteriormente, os resultados foram analisados, correlacionando o ângulo de fase (AnF) e a condição física cardiorrespiratória de acordo com o sexo e o AnF com a força de pressão manual. 71% apresentaram média do LAn abaixo da referência (4,5º ± 0,4), sendo 67% dos homens e 62% das mulheres. A correlação entre o LAn e a aptidão cardiorrespiratória deu um valor de R2= 0,50; p<0,0001. A associação entre LAn e força de pressão manual foi R2=0,35; p=0,0023. Encontrou-se relação significativa entre teste de aptidão cardiorrespiratória e NF e entre força de pressão manual e NF. É de importância clínica incluir parâmetros objetivos de avaliação celular em adultos mais velhos, como AnF.

Untangle the relationship of muscle mass and bone mineral content on handgrip strength: Results of ELSA-Brasil / Desvendando a relação entre massa muscular e conteúdo mineral ósseo na força de preensão palmar: Resultados do ELSA-Brasil

Abstract The study aims to investigate the independent association of muscle mass (MM) and bone mineral content (BMC) in the performance of the handgrip strength (HGS) test and whether there is effect modification by sex and age. In 12,491 participants from the ELSA-Brasil we estimated the associations between MM, BMC and HGS using linear regression models. All the analyses were performed for total population, also stratified for sex and age. For total population an interaction term was included between each explanatory variable of interest with sex and age to verify the presence of effect modification. We observed that the higher quintiles of MM and BMC were associated to an increasing in the mean of HGS compared to the first quintile, with greater magnitudes in men compared to women, also adults compared to elderly. When we estimated the independent effect of each exposure of interest, MM showed stronger effect in HGS in women, men and adults then BMC. In conclusion, we observed that higher amounts of MM and BMC are associated with higher HGS, regardless of sociodemographic characteristics, health conditions and lifestyle, with this effect being greater in men and adults.

Resumo O estudo tem como objetivo investigar a associação independente da massa muscular (MM) e conteúdo mineral ósseo (CMO) na realização do teste de força de preensão manual (FPM) e se há modificação do efeito por sexo e idade. Em 12.491 participantes do ELSA-Brasil estimamos as associações entre MM, CMO e FPM usando modelos de regressão linear. Todas as análises foram realizadas para a população total, também estratificada por sexo e idade. Para a população total foi incluído um termo de interação entre cada variável explicativa de interesse com sexo e idade para verificar a presença de modificação de efeito. Observamos que os maiores quintis de MM e BMC estiveram associados a um aumento na média da FPM em relação ao primeiro quintil, com maiores magnitudes em homens em relação a mulheres, também em adultos em relação a idosos. Quando estimamos o efeito independente de cada exposição de interesse, MM mostrou efeito mais forte na FPM em mulheres, homens e adultos do que BMC. Em conclusão, observamos que maiores quantidades de MM e BMC estão associadas a maior FPM, independentemente das características sociodemográficas, condições de saúde e estilo de vida, sendo esse efeito maior em homens e adultos.

Associação entre força de preensão manual e ângulo de fase em idosos da Estratégia Saúde da Família: um estudo transversal / Association between handgrip strength and phase angle in older adults from the Family Health Strategy: a cross-sectional study

Introdução: a Força de Preensão Manual (FPM) é um indicador de saúde e funcionalidade do idoso, que diminui com o passar do tempo, impactada por aspectos como mudanças na composição corporal. Objetivo: investigar a associação entre o Ângulo de Fase Padronizado (AFP) e FPM em idosos comunitários da Atenção Primária à Saúde (APS). Metodologia: estudo transversal, com pessoas de 60 anos ou mais, atendidos na APS. A variável dependente foi a FPM medida com dinamômetro e a independente principal foi o AFP com base no sexo e faixa etária, calculado a partir do ângulo de fase obtido pela bioimpedância. Foi realizada a regressão logística com entrada por bloco, sendo incluídas no modelo as variáveis que apresentaram associação com nível crítico menor do que 10%. Resultados: dos 296 indivíduos avaliados, 28,0% exibiram baixa FPM e 15,9% apresentaram AFP < ­ 1,65°. As variáveis inseridas no modelo final de regressão logística, juntamente com o AFP, foram sexo, faixa etária, Índice de Massa Corporal (IMC) e Circunferência da Panturrilha (CP). A análise mostrou que o AFP < ­ 1,65° aumenta a chance do idoso apresentar baixa FPM, tanto na análise sem ajuste (OR = 2,71; IC 95% 1,43-5,15), quanto no modelo final (OR = 2,35; IC 95% 1,14-4,87). Conclusão: o AFP mostrou-se associado à FPM, independentemente da interação com sexo, faixa etária, IMC e CP. A sua utilização pode contribuir na avaliação de idosos, especialmente quando a aferição da FPM não for possível.

Introduction: Handgrip Strength (HGS) is an indicator of health and functionality of the older adults, which decreases over time, impacted by aspects including changes in body composition. Objective: to investigate the association between the Standardized Phase Angle (SPA ) and HGS in community-dwelling older adults in Primary Health Care (PHC). Methodology: cross-sectional study, with people aged 60 or over, assisted in the PHC. The dependent variable was the HGS measured using a dynamometer. The main independent variable was the SPA based on gender and age range, calculated from the phase angle obtained by bioimpedance. Block-by-block logistic regression was performed, including variables that were associated with a critical level lower than 10% in the model. Results: of the 296 individuals assessed, 28.0% had low HGS and 15.9% had SPA < ­ 1.65°. The variables inserted in the final logistic regression model, together with the SPA , were gender, age group, Body Mass Index (BMI) and Calf Circumference (CC). The analysis showed that SPA < ­ 1.65° increases the chance of the older adults having low HGS, both in the unadjusted analysis (OR = 2.71; 95% CI 1.43-5.15) and in the final model (OR = 2.35; 95%CI 1.14-4.87). Conclusion: the SPA was associated with HGS, regardless of the interaction with sex, age group, BMI and CC. Its use can contribute to the evaluation of the older adults, especially when HGS measurement is not possible.

A cross-sectional study of influence of cerebral dominance on cardiovascular responses to autonomic stressor tests in adolescents

Background: Hand preference is perhaps the most obvious behavioral asymmetry observed in humans and is related to cerebral dominance. Animal and human studies have shown that cerebral cortex has a definite role in regulation of cardiovascular autonomic activity. Each hemisphere exhibits differential control over dynamics of heart especially the sympathetic activity is controlled by right hemisphere insula in particular. Hence, the present study was conducted to evaluate influence of cerebral dominance (handedness) on cardiovascular responses such as heart rate (HR) and blood pressure (BP) indices to autonomic stressor tests in the left and right hander adolescents. Aims and Objectives: The aim of the study was to evaluate the differences in cardiovascular responses in the left and right handers to autonomic stressor tests. Materials and Methods: The present cross-sectional study was conducted in 35 right and 35 left hander students of age group 16–20 years. Autonomic stressor tests used in the study were handgrip dynamometry and cold pressor test (CPT). Results: The right and left handers had similar baseline values of BP and HR. All the subjects responded to Autonomic function tests by increased BP and HR from baseline. The absolute BP values and change in BP from baseline were significantly higher in the left than right handers both during and after the tests. HR values showed significant differences in peak values during both the tests. Visual analog score was similar during CPT in both groups. Conclusion: The HR and BP responses to autonomic stressor tests are higher in the left handers than right handers supports the fact that the right hemisphere has more influence on sympathetic activity of heart.

ASSOCIATION BETWEEN BLOOD PRESSURE AND HAND GRIP STRENGTH AMONG ADULT POPULATION VISITING A TERTIARY CARE CENTRE – A CROSS–SECTIONAL STUDY

Introduction: It has been suggested that isometric handgrip resistance exercise be used as the first line treatment for hypertension. This cross-sectional study sought to better understand the association between adult individual's systolic and diastolic blood pressures with hand grip strength. The present study is a cross-s Methods: ectional study done among 240 healthy participants aged 19-40 years. Clearance was obtained from Institutional Ethical Committee. Blood pressure was recorded following standard precautions. The average of the maximum handgrip strength from both hands were taken into consideration. General linear models were used to examine the association between handgrip strength and blood pressure. Data was analyzed by Independent t test and Pearson correlation test using software, SPSS version 26. Handgrip strength was significantly and positively associated Results: with systolic blood pressure (P<0.001), diastolic blood pressure (P<0.001) and body mass Index (P<0.05). There was an increase in systolic blood pressure, diastolic blood pressure and body mass index with increase in handgrip strength. High systolic and diastolic blood pressures w Conclusion: ere associated with increased handgrip strength in both men and women. This aids in controlling blood pressure and might have implications for early prevention

Association between sarcopenia and metabolic syndrome in middle-aged and elderly people in Urumqi， Xinjiang / 上海预防医学

ObjectiveTo obtain the prevalence of sarcopenia in middle-aged and elderly people in Urumqi based on the 2020 updated based on the 2020 updated Consensus Report 2019 of Asian Working Group for Sarcopenia （AWGS2019）， and to further explore the association between sarcopenia and metabolic syndrome （MS）. MethodsA total of 1 438 middle-aged and elderly people （aged≥50 years） in Urumqi from July 2018 to January 2019 were selected as the research subjects. Data were collected by questionnaire survey， physical examination and laboratory test. Skeletal muscle mass，grip strength and 4 m walking speed were used to represent muscle mass， muscle strength and body function， respectively. Bioelectrical impedance analysis （BIA） was used to measure human body components. Based on the diagnostic criteria of sarcopenia recommended by AWGS2019， the prevalence of sarcopenia in people over 50 years old was obtained. Multivariate logistic regression model was used to explore the correlation between sarcopenia and MS in middle-aged and elderly people of different genders. ResultsThere were 194 patients with sarcopenia， with a prevalence of 13.49%. The prevalence was 15.56% in males and 12.12% in females. There was no significant difference in the prevalence of MS between male sarcopenia group （40.45%） and non-sarcopenia group （38.92%）， while the prevalence of MS in female sarcopenia group （39.04%） was higher than that in non-sarcopenia group （27.56%）. Multivariate logistic regression analysis showed that sarcopenia was a related factor of MS. Compared with non-sarcopenia， the risk of MS in male sarcopenia group was higher （OR=2.11，95%CI： 1.15‒3.88 ）. ConclusionSarcopenia increases the risk of MS in middle-aged and elderly people， with a greater risk in men. Fully understanding of sarcopenia is helpful to early identify high-risk groups of MS and prevent the occurrence of MS.

A Study of Impact of Examination Stress on Musculoskeletal Strength and Fatigue using Mosso’s Ergo Graph in first year Medical Students.

Background: Stress produces physiological and mental reactions in the body. Stressful life is most common experiences in human life. Mild stress is beneficial in performance but constant high stress may lead to anxiety and depression. Examination stress act as stressor and decreases the performance of student. A stressor is a change in the personal event or an environment that can cause stress. AIM: Present study was done to evaluate the muscle strength variations and fatigue under examination stress among medical students. Material and Method: Study involved 100 healthy boys and girls between 18-21 years of age. Who have no history of tobacco or alcohol consumption. Each students muscle strength was assessed by calculating work done using hand grip dynamometer and Mosso’s ergo graph, once during routine schedule in relaxed state (with no examination) and again during stressed state (during mid- term examination). Result: The amount of work done and handgrip strength was significantly higher on relaxed state compared to during examination. Conclusion: This study suggests that as examinations act as unavoidable stressors, which lead to the variation in the performance of the students. The medical teachers as well as students should be made aware of the negative consequences of stress faced during medical training. Effective relaxation program and psychological counselling services should be provided to students so that they cope better with examination stress.

Trend of handgrip strength in male and female medical students from North India

Background: Handgrip strength is the maximum force produced during a maximal voluntary contraction (MVC) handgrip strength (HGS). The handgrip dynamometer is used to work out upper-body muscles, particularly those in the forearm and hand. HGS is frequently used as an objective measure of upper extremity functional integrity. HGS is a physiological characteristic influenced by a variety of parameters such as gender, age, and body size. Aims and Objectives: The objective of th study was to assess and compare HGS in healthy first-phase male and female medical subjects. Materials and Methods: In a cross-sectional research, 250 healthy 1st-year medical students between the ages of 17 and 20 participated. Maximum HGS was measured using a handgrip dynamometer. The grip strength of the dominant hand was assessed 3 times at minute intervals, as suggested by the American Society of Hand Therapists, with the higher value (in kg) reflecting the maximal HGS for each. Results: In comparison to female subjects (Mean: 31.87 kg), HGS in male subjects (Mean: 41.85 Kg) was statistically significant (P < 0.001). There was a statistically significant difference in height, weight, and body mass index between men and women, despite the fact that there was no statistically significant difference in mean age. Conclusion: Male individuals had stronger grips than female ones. The purpose of this study is to provide a baseline of normative data (control values) among a sample cohort of GMC Jammu medical students. This study, however, was confined to medical students between the ages of 17 and 20. We believe that diverse age groups should be studied.

Strength and strength-related anthropometric parameters of the international level canoe slalom male paddlers / Fuerza y parámetros antropométricos relacionados con la fuerza de los hombres remeros de canotaje slalom de nivel internacional

SUMMARY: The aim of the study was to determine the differences in hand-grip strength and strength-related anthropometric parameters between the highest-performance international paddlers (HILP) and other international paddlers (ILP) in canoe slalom. In male competitors (n=48; 23 canoeists and 25 kayakers) who took part in the 2018 European championship event in canoe slalom in Prague, Czech Republic representing 15 European countries were measured hand-grip strength and strength-related anthropometric parameters two days prior the event. Differences between the group of HILP (medallists from Olympic Games, world championship and European championship in the previous three years and European championship finalists at the same time) and ILP were found. HILP have significantly higher forearm, arm and chest girths than ILP. Moderate or high practical differences and margin statistic differences were found also for hand-grip strength, body weight, body mass index and age. The consistently high-performing paddlers are heavier, have more muscular upper body and are stronger than the other group, while keeping their lower body lean. Therefore, regular upper-body strength training to all canoe slalom paddlers is important but caution is required because body weight over 80 kg may be a limiting factor.

RESUMEN: El objetivo del estudio fue determinar las diferencias en la fuerza de prensión manual y los parámetros antropométricos relacionados con la fuerza entre los remeros internacionales de alto rendimiento (RIAR) y otros remeros internacionales de canotaje en slalom. En hombres competidores (n=48; 23 piragüistas y 25 kayakistas) que participaron en el campeonato europeo de slalom en canoa de 2018, en Praga, República Checa, que representa a 15 países europeos, se midió la fuerza de agarre manual y los parámetros antropométricos relacionados con la fuerza dos días antes del evento. Se encontraron diferencias entre el grupo de RIAR (medallistas de Juegos Olímpicos, campeonatos del mundo y campeonatos de Europa en los tres años anteriores y finalistas del campeonato de Europa al mismo tiempo) y remeros internacionales. Los RIAR presentaban circunferencias de antebrazo, brazo y pecho significativamente más altas que los remeros internacionales. Además, se encontraron diferencias prácticas moderadas o altas y diferencias estadísticas en el límite para la fuerza de prensión manual, el peso corporal, el índice de masa corporal y la edad. Los remeros de alto rendimiento son más pesados, tienen la parte superior del cuerpo más musculosa y son más fuertes que el otro grupo, mientras mantienen la parte inferior del cuerpo esbelta. Por lo tanto, es importante el entrenamiento regular de fuerza de la parte superior del cuerpo para todos los remeros de piragüismo, sin embargo se requiere precaución debido a que el peso corporal superior a 80 kg puede ser un factor limitante.

Correlation of body fat percentage, fat mass, fat free mass, and fat free mass index with hand grip strength in healthy young males in a tertiary health care center of South Odisha

Background: Handgrip strength (HGS) is an important parameter to assess the upper extremity muscular strength. Aims and Objectives: Aim of the study is to record HGS in healthy young males and to compare with fat mass (FM), fat-free mass, fat-free mass index, and to find out which is better correlated. Materials and Methods: A total of one hundred and fourteen first year male medical students of age between 17 and 22 years were taken as sample. Results: The correlation between fat free mass, fat free mass index with HGS was found to be extremely significant whereas correlation between FAT%, FM with HGS was not significant. Conclusion: Increase in lean body mass increases muscular strength as fat-free mass and fat-free mass index positively and significantly correlated with HGS.

Correlação entre funcionalidade e força de preensão manual e a condição de fragilidade física em idosos da atenção primária à saúde / Correlation between functionality and handgrip strength and the condition of physical frailty in elderly people in primary health care

Resumo: Trata-se de estudo quantitativo transversal cujo objetivo foi analisar a correlação entre funcionalidade e força de preensão manual e a condição de fragilidade física em idosos da atenção primária à saúde. Participaram 389 idosos (=60 anos) de ambos os sexos, cadastrados em uma Unidade Básica de Saúde de Curitiba, Paraná. A coleta de dados ocorreu de janeiro a novembro de 2019, foi precedida pela aplicação do miniexame do estado mental, seguida dos questionários sociodemográfico e clínico, escala da medida de independência funcional (MIF) e avaliação da fragilidade física. Os dados foram organizados no programa Microsoft Excel® 2007 e analisados no software R CORE TEAM, mediante estatística descritiva, análises bivariadas (p<0,05), testes de Kruskal-Wallis, Dunn, qui-quadrado e Spearman. Dos 389 idosos, 34 (8,7%) eram frágeis, 186 (47,8%) pré-frágeis, 169 (43,5%) não frágeis, 255 (65,6%) do sexo feminino e 186 (47,8%) na faixa etária entre 60 e 69 anos. A FPM reduzida foi identificada em 82 (21%) idosos e distribuída entre 27 (79,5%) frágeis e 55 (29,5%) pré-frágeis. Houve correlação significativa entre funcionalidade e força de preensão manual segundo à condição de fragilidade física (Pˆ= 0,330; p=<0,001). A média da FPM foi maior no grupo de idosos não frágeis (28,9 Kgf), comparada aos pré-frágeis (24,6 Kgf) e frágeis (17,1 Kgf). A pontuação média da funcionalidade (MIF) foi maior no grupo de idosos não frágeis (122,1 pontos) em relação aos pré-frágeis (120,6pontos) e frágeis (114,2 pontos). Quanto à tarefa da MIF "controle de urina", observou-se elevada frequência idosos frágeis completamente dependentes (n=9; 26,4%) e pré-frágeis moderadamente dependentes (n=52; 27,9%). Para a tarefa "interação social" observou-se expressiva frequência de idosos frágeis moderadamente dependentes(n=12; 35,3%). Para a tarefa "resolução de problemas" evidenciou-se a mesma frequência (n=7; 20,6%) de idosos frágeis completamente dependentes e moderadamente dependentes. Na avaliação da tarefa "memória" destacaram-se os pré-frágeis moderadamente dependentes (n=26; 14%). A correlação entre funcionalidade (MIF) e FPM se mostrou fraca, positiva e significativa entre os idosos da amostra investigada (Pˆ= 0,330; p=<0,001), entre os não frágeis (Pˆ= 0,252;p=<0,001) e entre os pré-frágeis (Pˆ= 0,236; p=0,001). O desempenho nas tarefas "controle de urina" e "subir e descer escadas" correlacionou-se significativamente à FPM (p=<0,005) entre os idosos pré-frágeis. Destacam-se, com maior coeficiente de correlação com a FPM, as tarefas "controle de urina" para os idosos não frágeis (Pˆ=0,309) e "subir e descer escadas" para os pré-frágeis (Pˆ=0,222). Já a tarefa "resolução de problemas" correlacionou-se à FPM entre os idosos pré-frágeis (p=<0,004) e frágeis (p=<0,017), sendo entre esses o maior coeficiente de correlação (Pˆ= 0,408). Verifica-se ainda a correlação entre a tarefa "expressão verbal e não verbal" e a FPM para o grupo de idosos frágeis (p=<0,025; Pˆ= 0,383). Conclui-se que houve correlação positiva entre funcionalidade e FPM entre os idosos não frágeis e pré-frágeis, indicando que quanto maior a FPM, melhor é o desempenho funcional. Destacam-se resultados expressivos para a prática clínica de enfermagem gerontológica, que podem subsidiar estratégias preventivas voltadas à manutenção da FPM e da funcionalidade, principalmente entre os idosos não frágeis e pré-frágeis.

Abstract: This is a cross-sectional quantitative study whose objective was to analyze the correlation between functionality and handgrip strength and the condition of physical frailty in elderly people in primary health care. Participants were 389 elderly people (=60 years) of both sexes, registered at a Basic Health Unit in Curitiba, Paraná. Data collection took place from January to November 2019, was preceded by the application of the mini-mental state exam, followed by sociodemographic and clinical questionnaires, functional independence measure scale (FIM), and assessment of physical frailty. Data were organized in Microsoft Excel® 2007 program and analyzed in R CORE TEAM software, using descriptive statistics, bivariate analyzes (p<0.05), Kruskal-Wallis, Dunn, chi-square, and Spearman tests. Of the 389 elderly, 34 (8.7%) were frail, 186 (47.8%) were pre-frail, 169 (43.5%) were non-frail, 255 (65.6%) were female and 186 (47.8%) in the age group between 60 and 69 years. Reduced HGS was identified in 82 (21%) elderly and distributed among 27 (79.5%) frail and 55 (29.5%) pre-frail. There was a significant correlation between functionality and handgrip strength according to the condition of physical frailty (Pˆ=0.330; p=<0.001). The average HGS was higher in the group of non-frail elderly (28.9 Kgf), compared to pre-frail (24.6 Kgf) and frail (17.1 Kgf). The mean functionality score (MIF) was higher in the group of non-frail elderly (122.1 points) compared to pre-frail (120.6 points) and frail (114.2 points). As for the FIM task "urine control", a high frequency of completely dependent frail elderly (n=9; 26.4%) and moderately dependent pre-frail (n=52; 27.9%) was observed. For the "social interaction" task, there was a significant frequency of moderately dependent frail elderly was observed (n=12; 35.3%). For the "problem solving" task, the same frequency (n=7; 20.6%) of completely dependent and moderately dependent frail elderly individuals was observed. In the evaluation of the "memory" task, the moderately dependent pre-frail stood out (n=26; 14%). The correlation between functionality (MIF) and HGS was weak, positive, and significant among the elderly in the investigated sample (Pˆ= 0.330; p=<0.001), among the nonfrail (Pˆ=0.252; p=<0.001) and among the elderly. pre-fragile (Pˆ= 0.236; p=0.001). The performance in the tasks "urine control" and "going up and down stairs" was significantly correlated with HGS (p=<0.005) among the pre-frail elderly. The tasks "urine control" for the non-frail elderly (Pˆ=0.309) and "going up and down stairs" for the pre-frail stand out, with the highest correlation coefficient with HGS (Pˆ=0.222). The "problem solving" task was correlated with HGS among pre-frail (p=<0.004) and frail (p=<0.017) elderly, with the highest correlation coefficient (Pˆ=0.408) among these. There is also a correlation between the task "verbal and non-verbal expression" and HGS for the frail elderly group (p=<0.025; Pˆ=0.383). It was concluded that there was a positive correlation between functionality and HGS among the non-frail and pre-frail elderly, indicating that the higher the HGS, the better the functional performance. Significant results for the clinical practice of gerontological nursing stand out, which can support preventive strategies aimed at maintaining HGS and functionality, especially among non-frail and pre-frail elderly people.

The associations of muscle size and density with handgrip strength and timed up and go test / 中华老年医学杂志

Objective:The aim of this study was to explore the associations of muscle size and density with handgrip strength(HGS)and the Timed Up and Go(TUG)test.Methods:Totally 301 participants living in the Xinjiekou community near Beijing Jishuitan Hospital were recruited for CT imaging of the hip and a 1-cm slice of the mid-thigh.The cross-sectional area and density of the gluteus maximus and the mid-thigh muscles were estimated by the Osirix viewer based on CT images.HGS and TUG were also performed in these subjects.Logistic regression analysis was used to evaluate the correlations of muscle density and size with TUG and grip strength.Results:In women, after adjustment for age and BMI, the density of the gluteus maximus was negatively correlated with TUG( P trend=0.0366), while the size of the gluteus maximus and the mid-thigh muscles was not correlated with TUG.In men, the density or size of these muscles was not correlated with TUG.After adjustment for age and BMI, the density of the gluteus maximus was positively correlated with grip strength( P trend=0.0334)and the size of the mid-thigh muscles was also positively correlated with grip strength( P trend=0.0155)in men, but they were not correlated with grip strength in women. Conclusions:There were sex differences in the relationship between muscle size or density and grip strength or timed up and go.The density of the gluteus maximus is associated with muscle strength and physical performance while the size of the mid-thigh muscles is correlated with muscle strength.

Handgrip Strength Assessment and Its Associated Factors among Hospitalized Elderly in Klang Valley Hospitals

@#Introduction: Handgrip strength is a crucial biomarker of aging. Poor handgrip strength among hospitalized elderly increases the risk of health complications leading to a higher risk of hospital readmissions and mortality. This study aimed to determine handgrip strength among hospitalized elderly in Klang Valley hospitals alongside its associated factors. Methods: A total of 57 subjects were recruited for this study. Face-to-face interviews and physical assessments were conducted to obtain data on sociodemographic factors, medical background, anthropometry assessments and biochemical markers level. Dietary intake was obtained through two days of 24-hour dietary recall while tools such as Global Oral Health Assessment Index (GOHAI) and Mini Nutrition Assessment- Short Form (MNA-SF) were used to assess perception towards oral health and malnutrition risk, respectively. Reference value from the Asian Working Group of Sarcopenia (2014) was used to compare handgrip strength. Results: 94.7% of the subjects were found to have low handgrip strength with a mean value of 8.28 + 6.92 kg/force. Factors including age (r=- 0.370, p=0.005), educational level (r=0.471, p=<0.0005), perception towards oral health (r=0.370, p=0.005) and energy intake (r=0.367, p=0.005) were significantly associated with handgrip strength. Meanwhile, other variables were not significantly associated. Conclusion: The majority of the subjects had poor handgrip strength. Factors such as age, educational level, perception towards oral health and energy intake were significantly associated with handgrip strength while the rest were non-significantly associated. Thus, more research and intervention strategies should be done to improve handgrip strength among hospitalized elderly to achieve a healthy aging nation.

Convenience of “Loco-check” Combination in Quick Screening of Latent Preliminary Group of Locomotive Syndrome by Measurement of Handgrip Strength: Secondary Analysis of the Previous Report / 社会薬学

As a screening tool for detecting latent pre-locomotive syndrome (latent pre-LS) in women over the age of 40, measuring handgrip strength with a cut-off value of 26 kg was proposed in a previous report. However, this screening method missed 22% of latent pre-LS. It would be beneficial to screen almost persons with latent pre-LS in community pharmacies. In this study, it was investigated whether screening using the combination of measuring handgrip strength and the questionnaire, “Loco-check,” which was proposed by the Japanese Orthopaedic Association, improved the detection of latent pre-LS in the same group mentioned above. Combining only one of the “Loco-check” questions, “I cannot put on a pair of socks while standing on one leg,” with the measurement of handgrip strength with the cut-off value of 26 kg, the detection of latent pre-LS was increased to 90.2%. The odds ratio was 9.72 in logistic regression analysis. Using the combination of the measurement of handgrip strength and the response to one question is both rapid and convenient. Therefore, in this study, this screening combination is proposed to be a useful tool in community pharmacies for detecting early latent pre-LS.

Postural balance, handgrip strength and mobility in Brazilian children and adolescents with osteogenesis imperfecta

Abstract Objective To describe postural balance, handgrip strength and mobility in children and adolescents with different types of osteogenesis imperfecta. Methods Cross-sectional study. Fifty selected subjects diagnosed with types I (n = 11), III (n = 21), and IV (n = 18), followed up at Brazilian reference center for osteogenesis imperfecta in the Midwest region, aged 2-21 years (9.2 ± 5.0), were enrolled in this study. Children and adolescents were evaluated for postural balance in the upright position with eyes-open and eyes-closed conditions, handgrip strength and the mobility domain (Pediatric Dysfunction Assessment Inventory). Data normality and difference between groups was verified. Results Handgrip strength was significantly lower in people with type III of osteogenesis imperfecta when compared to the osteogenesis imperfecta types I and IV, and to the age-specific reference data. Center of pressure length and mean velocity in the condition with eyes closed were worse compared to the open-eyes condition for children and adolescents with type I of osteogenesis imperfecta. There were worse results in the mobility domain for the participants classified with the most severe type of osteogenesis imperfecta. Conclusions It was observed that the severity of the osteogenesis imperfecta disease affected handgrip strength and locomotor function assessed by the mobility domain. Comparing osteogenesis imperfecta types, the higher the severity of osteogenesis imperfecta, the lower the handgrip strength. These results can contribute to new strategies of treatment focused on improving functional capacity and quality of life in people with osteogenesis imperfecta.

Knee extension strength and handgrip strength are important predictors of Timed Up and Go test performance among community-dwelling elderly women: a cross-sectional study

ABSTRACT BACKGROUND: Handgrip and knee extension strengths have each been used to characterize disability. However, it has been reported that the association between handgrip and knee extension strengths is weak. OBJECTIVE: To evaluate the influence of knee extensor and handgrip muscle strength on Timed Up and Go (TUG) test results among elderly women with worse (≥ 10 seconds) and better (< 10 seconds) performance, after controlling for confounders. DATA AND SETTING: Cross-sectional study on a sample selected according to convenience, carried out in a federal public institution of higher education. METHODS: Assessment of handgrip was carried out using the Jamar dynamometer (Lafayette Instrument Company, Inc., Lafayette, United States). Knee extensor muscle performance was measured using an isokinetic dynamometer (Biodex System 3 Pro; Biodex Medical Systems, Inc., United States), The confounding factors were education, age, comorbidities, body mass index and Geriatric Depression Scale and Human Activity Profile scores. Functional performance was assessed through the TUG test. A backward linear regression model was used. RESULTS: 127 elderly women performed the TUG test in more than 10 seconds and 93 in less than 10 seconds. However, regardless of test performance, handgrip strength and knee extension strength comprised the reduced final model. CONCLUSIONS: Knee extension strength and handgrip strength might be particularly useful indicators for measuring disability.

Associations of Sarcopenia, Handgrip Strength and Calf Circumference with Cognitive Impairment among Chinese Older Adults / 生物医学与环境科学（英文）

Objective@#To evaluate the associations of sarcopenia, handgrip strength and calf circumference with cognitive impairment among Chinese older adults.@*Methods@#Totally 2,525 older adults were recruited from the Healthy Aging and Biomarkers Cohort Study. Cognitive impairment was assessed by the Chinese Mini-Mental State Examination. Handgrip strength was calculated from the means of the right and left hand values. Calf circumference was measured at the site of maximum circumference of the non-dominant leg. The formula developed by Ishii was used to define sarcopenia. Multiple logistic regression was performed to evaluate the associations of sarcopenia, handgrip strength, and calf circumference with cognitive impairment.@*Results@#The prevalence of cognitive impairment was 34.36%. The adjusted odds ratio ( @*Conclusion@#Sarcopenia, identified by low handgrip strength and low calf circumference, was positively associated with cognitive impairment.

Association between height-related polymorphism rs17081935 and reduced handgrip strength in relation to status of atherosclerosis: a cross-sectional study

BACKGROUND@#Aging is a process that increases oxidative stress. Increased oxidative stress leads to the development of atherosclerosis and mitochondrial dysfunction. Mitochondria contribute to energy production that might have a beneficial influence on maintaining muscle strength. Therefore, the height-related single nucleotide polymorphism (SNP) rs17081935, which is also reported to be associated with mitochondrial metabolism, might be associated with reduced muscle strength and this association might be affected by atherosclerosis status. To clarify those associations, a cross-sectional study of 1374 elderly Japanese individuals aged 60-89 years was conducted.@*METHODS@#Logistic regression was used to clarify the association between rs17081935 and reduced handgrip strength. Since atherosclerosis might affect handgrip strength, participants were stratified by atherosclerosis status. Reduced handgrip strength was defined as being in the lowest quintile of handgrip strength (< 25.6 kg for men and < 16.1 kg for women).@*RESULTS@#No significant associations were found between a minor allele of rs17081935 and reduced handgrip strength among elderly participants without atherosclerosis. A significant inverse association was observed among elderly participants with atherosclerosis. After adjusting for known cardiovascular risk factors and height, the adjusted odd ratio (OR) and 95% confidence interval (CI) for reduced handgrip strength and a minor allele of rs17081935 were 1.13 (0.86, 1.43) for elderly participants without atherosclerosis and 0.55 (0.36, 0.86) for those with atherosclerosis, respectively.@*CONCLUSION@#A minor allele of the height-related SNP rs17081935 was significantly inversely associated with reduced handgrip strength among older individuals with atherosclerosis, but not among those without atherosclerosis.

The effects of active vs. passive recovery on riding performance during a simulated motocross race

Abstract Aims: Motocross consists of two races of 30 min with a break in between. Recovery between races is paramount to performance, this study aimed to compare the effects of active and passive recovery between motocross races on riding performance. Methods: Thirteen elite and non-elite racers performed two races of 30 min with 1 h break, twice with two-week interval. Between the races active (20 min ergometer cycling at 60% of HRmax) or passive recovery (no activity) were executed in a randomized order. Lap times, heart rate during riding, blood lactate, reaction time, handgrip strength, upper back pull strength, counter movement jump height, and medicine ball throw distance were measured before and after both races. Serum creatine kinase enzyme activity and strength tests were assessed also 24 h after the races. Results: No statistically significant differences were observed in any variables between protocols. A significant drop in handgrip strength was found post-race values (p < 0.001). Post-racing creatine kinase values were above resting levels. Conclusion: These results do not support the use of active recovery in between motocross races for restoration of neuromuscular or riding performance. Motocross seems to cause some exercise-induced muscle damage; thus, some rest is required to recover homeostasis.