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1.
Acta Ortop Mex ; 35(1): 56-60, 2021.
Artigo em Espanhol | MEDLINE | ID: mdl-34480441

RESUMO

INTRODUCTION: The biomechanical characterization of grip involves the determination of the different kinematic and dynamic variables that affect its different phases: transport, grip formation and manipulation, as well as its relationship with the anthropometric characteristics of the subject and those of the object. The contact force in the fingers during the making of bidigital or multi-digital grips but involving only the use of distal phalanges (grip type clamp) and cylindrical power grip are among the most used for daily activities. Hand grip force measurement is an essential element for follow-up during growth, injury, rehabilitation and therapeutic trials. MATERIAL AND METHODS: Descriptive, prospective, cross-sectional study with 61 patients without upper extremity pathology, 30 male, 31 female, with age range of 20 to 59 years, anthropometric measurements and Force test (kg/strength) were performed. The variables were statistically analyzed with Pearson's "r" and Mann-Whitney's U. RESULTS: The hand grip and clamp 1 Force of the dominant hand as non-dominant is correlated with weight, size, body fat percentage and wrist circumference, HGF and clamp 1 in both the dominant and non-dominant hand is higher in men than in women, with p < 0.05. CONCLUSIONS: The average HGF of the dominant hand is higher than in the non-dominant for men and women. This is related to weight, size, body fat percentage and wrist circumference.


Assuntos
Força da Mão , Mãos , Adulto , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Articulação do Punho , Adulto Jovem
2.
Nihon Ronen Igakkai Zasshi ; 58(3): 436-445, 2021.
Artigo em Japonês | MEDLINE | ID: mdl-34483171

RESUMO

AIM: To clarify the factors associated with a decreased activity in elderly requiring support/care. METHODS: We included 340 of the 671 people receiving outpatient rehabilitation services under the long-term care insurance system in the present study. These subjects were classified as the favorable motor function group, based on the findings from previous studies, as they required ≤12 seconds to complete the Timed Up & Go test (TUG) task. All of the subjects agreed to participate in the study. The study items were as follows: the LSA score; age; sex; diagnosis name; care grade; number of family members living together; number of times the service was used; TUG score; hand grip strength; scores from the Tokyo Metropolitan Institute of Gerontology Index of Competence, Fall Efficacy Scale (FES), Geriatric Depression Scale Short-Version (Japanese), subjective health, and Japanese version of the Six-item Lubben Social Network Scale score; hobbies; role in the household; availability of nearby public transportation services; presence of accessible supermarkets; and presence of pain. On a statistical analysis, we divided the subjects into 2 groups based on their LSA scores: those with a decreased activity (<56) and those with a favorable function/activity (≥56). We then conducted the unpaired t-test and chi-square test to examine these binary variables. Subsequently, we performed a multiple logistic regression analysis with the binary variables as dependent variables. For statistical processing, we used the SPSS Statistics software program, ver. 25, and set the significance level at <5%. RESULTS: Among the 340 subjects, 139 and 201 were categorized as the decreased activity and favorable function/activity groups, respectively. Through a multiple logistic regression analysis, we obtained the following odds ratios: Instrumental Activities of Daily Living (IADL), 0.608 (95% confidence interval: 0.453-0.816); FES, 0.908 (0.855-0.963); and availability of nearby public transportation services, 0.619 (0.390-0.982). CONCLUSIONS: These results suggested the feasibility of identifying factors associated with decreased activity by appropriately conducting assessments using the IADL and FES and availability of nearby public transportation services.


Assuntos
Atividades Cotidianas , Força da Mão , Acidentes por Quedas , Idoso , Humanos , Seguro de Assistência de Longo Prazo , Tóquio
3.
BMC Geriatr ; 21(1): 475, 2021 08 31.
Artigo em Inglês | MEDLINE | ID: mdl-34465287

RESUMO

BACKGROUND: Grip strength is an indicator of physical function with potential predictive value for health in ageing populations. We assessed whether trends in grip strength from midlife predicted later-life brain health and cognition. METHODS: 446 participants in an ongoing British birth cohort study, the National Survey of Health and Development (NSHD), had their maximum grip strength measured at ages 53, 60-64, and 69, and subsequently underwent neuroimaging as part of a neuroscience sub-study, referred to as "Insight 46", at age 69-71. A group-based trajectory model identified latent groups of individuals in the whole NSHD cohort with below- or above-average grip strength over time, plus a reference group. Group assignment, plus standardised grip strength levels and change from midlife were each related to measures of whole-brain volume (WBV) and white matter hyperintensity volume (WMHV), plus several cognitive tests. Models were adjusted for sex, body size, head size (where appropriate), sociodemographics, and behavioural and vascular risk factors. RESULTS: Lower grip strength from midlife was associated with smaller WBV and lower matrix reasoning scores at age 69-71, with findings consistent between analysis of individual time points and analysis of trajectory groups. There was little evidence of an association between grip strength and other cognitive test scores. Although greater declines in grip strength showed a weak association with higher WMHV at age 69-71, trends in the opposite direction were seen at individual time points with higher grip strength at ages 60-64, and 69 associated with higher WMHV. CONCLUSIONS: This study provides preliminary evidence that maximum grip strength may have value in predicting brain health. Future work should assess to what extent age-related declines in grip strength from midlife reflect concurrent changes in brain structure.


Assuntos
Encéfalo , Cognição , Idoso , Envelhecimento , Encéfalo/diagnóstico por imagem , Estudos de Coortes , Força da Mão , Humanos
4.
BMC Geriatr ; 21(1): 476, 2021 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-34470612

RESUMO

BACKGROUND: While gait speed, one-leg standing balance, and handgrip strength have been shown to be independent predictors for functional disability, it is unclear whether such simple measures of physical function contribute to improved risk prediction of functional disability in older adults. METHODS: A total of 1,591 adults aged ≥ 65 years and without functional disability at baseline were followed up for up to 7.9 years. Functional disability was identified using the database of Japan's Long-term Care Insurance System. Maximum gait speed, one-leg standing time, and handgrip strength were measured at baseline. Cox proportional hazard models were used to estimate the hazard ratios (HRs) and 95 % confidence intervals (CIs) for the association of physical function and functional disability incidence. The incremental predictive value of each physical function measure for risk prediction was quantified using the difference in overall C-statistic, category-free net reclassification improvement (NRI), and integrated discrimination improvement (IDI) index. RESULTS: During follow-up (median: 7.8 years), functional disability was identified in 384 participants. All of the physical function measures were inversely associated with the risk of functional disability, independent of potential confounding factors. The multivariable adjusted HRs (95 % CIs) for functional disability per one standard deviation increment of maximum gait speed, one-leg-standing time, and hand grip strength were 0.73 (0.65-0.83), 0.68 (0.59-0.79), and 0.72 (0.59-0.86), respectively. Incorporation of each of maximum gait speed, one-leg-stand time, and hand grip strength into a basic model with other risk factors significantly improved C-statistic from 0.770 (95 % CIs, 0.751-0.794) to 0.778 (0.759-0.803), 0.782 (0.760-0.805), and 0.775 (0.756-0.800), respectively (all p < 0.05). A model including all three measures had the highest C-statistic of 0.787 (0.765-0.810). The improvements in risk prediction were also confirmed by category-free NRI and IDI index. CONCLUSIONS: Adding any of the three measures to a basic model with other known risk factors significantly improved the prediction of functional disability and addition of all three measures provided further improvement of the prediction in older Japanese adults. These data provide robust evidence to support the practical utility of incorporating these simple physical function measures into functional disability risk prediction tools.


Assuntos
Força da Mão , Vida Independente , Idoso , Humanos , Japão/epidemiologia , Estudos Prospectivos , Velocidade de Caminhada
5.
BMC Musculoskelet Disord ; 22(1): 766, 2021 Sep 08.
Artigo em Inglês | MEDLINE | ID: mdl-34496832

RESUMO

BACKGROUND: It is controversial whether or not the carpometacarpal joint (CMCJ) should be included in total wrist arthrodesis (TWA). Complications commonly occur at this site and studies examining its inclusion and exclusion are conflicting. A randomised clinical trial comparing wrist arthrodesis with CMCJ arthrodesis and spanning plate to wrist arthrodesis with CMCJ preservation and non-CMCJ spanning plate has not been performed. METHOD: A single centre randomised clinical trial including 120 adults with end-stage isolated wrist arthritis will be performed to compare TWA with and without the CMCJ included in the arthrodesis. The primary outcome is complications in the first post-operative year. Secondary outcomes are Disabilities of the Arm, Shoulder and Hand (DASH) score, Patient Rated Wrist Evaluation (PRWE) and grip strength measured at 1, 2 and 5 years. Late complications, return to work and satisfaction will also be recorded. DISCUSSION: It is unknown whether the CMCJ should be included in TWA. This trial will contribute to an improved understanding of optimal management of the CMCJ in total wrist arthrodesis. TRIAL REGISTRATION: This trial was prospectively registered with the Australia New Zealand Clinical Trials Registry with identifying number ACTRN12621000169842 on the 16th February 2021. WHO: U1111-12626523. ANZCTR: ACTRN12621000169842.


Assuntos
Articulações Carpometacarpais , Artrodese/efeitos adversos , Placas Ósseas , Articulações Carpometacarpais/diagnóstico por imagem , Articulações Carpometacarpais/cirurgia , Força da Mão , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do Tratamento , Punho , Articulação do Punho/diagnóstico por imagem , Articulação do Punho/cirurgia
6.
Top Spinal Cord Inj Rehabil ; 27(3): 49-59, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34456546

RESUMO

Objectives: To establish predictive equations for peak torque of muscle groups with totally and partially preserved innervation in individuals with motor complete spinal cord injury (SCI), based on hand dynamometry and strength predictor variables. Methods: The cross-sectional study conducted at a rehabilitation hospital consecutively recruited 108 men and women with SCI. All participants performed maximum peak torque tests for shoulder abduction/adduction (isokinetic), trunk flexion/extension (isometric), and handgrip strength testing (hand dynamometer) to establish predictive peak torque equations. The primary outcomes were peak torque variables. Handgrip strength, age, injury level, time since injury, age at injury, body mass, height, body mass index, and physical activity level were the secondary outcomes used as strength predictor variables. Results: Handgrip strength was a predictor variable for shoulder abduction/adduction peak torque. The best predictive models for shoulder abduction/adduction peak torque exhibited R 2 = 0.57 and R 2 = 0.60, respectively (p ≤ .05). Injury level showed the highest significant predictive capacity for trunk flexion/extension peak torque models (R 2 = 0.38 and R 2 = 0.29; p ≤ .05). Conclusion: Shoulder abduction/adduction peak torque predictive equations may be an alternative for use in an accessible strength tool (hand dynamometry) to evaluate training and rehabilitation programs. Trunk flexion/extension peak torque equations exhibited moderate correlations and high standard error of the estimates and should be used with caution.


Assuntos
Força da Mão/fisiologia , Traumatismos da Medula Espinal/fisiopatologia , Adulto , Estudos Transversais , Feminino , Humanos , Masculino , Força Muscular/fisiologia , Dinamômetro de Força Muscular , Valor Preditivo dos Testes , Torque , Adulto Jovem
7.
Top Spinal Cord Inj Rehabil ; 27(3): 60-69, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34456547

RESUMO

Objectives: To determine optimal handgrip strength (HGS) cutoff points for greater functional independence and wheelchair skills in men with spinal cord injury (SCI), and to establish predictive equations for functional independence and wheelchair ability in men with SCI, based on demographic characteristics, HGS, and functionality. Methods: In this cross-sectional study conducted at a rehabilitation hospital, 54 men with SCI were recruited and stratified into high and low paraplegia groups. All participants performed a maximum HGS test to determine cutoff points for the Spinal Cord Independence Measure (SCIM-III) and Adapted Manual Wheelchair Circuit (AMWC). The primary outcomes were the SCIM-III, AMWC, and HGS. Demographic characteristics obtained from participants' electronic medical records were the secondary outcomes, used as predictor variables of functional independence. Results: The SCIM-III scale, performance score, and 3-minute overground wheeling test presented significant regression equations (R = 0.45, R = 0.69, and R = 0.72). The HGS showed a cutoff point of 102.5 kilogram force (kgf) to achieve a score of 70 on the SCIM-III and a 3-minute overground wheeling distance of 270 m. The HGS cutoff point to obtain a performance score of 23.7 seconds was 93.0 kgf. Conclusion: The HGS was a significant predictor for the SCIM-III score, AMWC performance score, and 3-minute overground wheeling test. Three significant predictive equations were established based on HGS. The cutoff points could be adopted as parameters for optimal functional independence and wheelchair skills.


Assuntos
Estado Funcional , Força da Mão/fisiologia , Traumatismos da Medula Espinal/fisiopatologia , Traumatismos da Medula Espinal/reabilitação , Cadeiras de Rodas , Adulto , Estudos Transversais , Humanos , Masculino , Valor Preditivo dos Testes , Adulto Jovem
8.
BMC Res Notes ; 14(1): 332, 2021 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-34454579

RESUMO

OBJECTIVE: Previous studies have shown that relative handgrip strength, handgrip measure divided by body mass index (BMI), affects the future onset of diabetes and prediabetes. However, fat free mass (FFM) has been suggested to adjust for this effect better than BMI. In this study, we examined applicability of models that adjusted handgrip-diabetes relationship with either BMI or FFM. RESULTS: Of 1940 participants (56.2% male, average (SD) age, 57.2 [11.2] years), 267 (13.8%) had diabetes (DM) and 912 (47.0%) had prediabetes (pre-DM). The average handgrip measure for men was 40.0 kg (tertile measures, 37.4 kg and 42.5 kg) and for women 24.2 kg (tertile measures, 22.6 kg and 25.7 kg). Among both sexes, the percentage of people unaffected by DM or pre-DM was highest in the strong handgrip group and lowest in the weak handgrip group. Analysis using binary logistic models showed that an increase in handgrip measure was associated with a decrease in the chance of having either pre-DM or DM. This effect was detected by both BMI models and FFM models, even after adjustment for medical and lifestyle factors. Either or both should be used depending on the research aims, setting and methods.


Assuntos
Diabetes Mellitus , Estado Pré-Diabético , Composição Corporal , Índice de Massa Corporal , Feminino , Força da Mão , Humanos , Masculino , Pessoa de Meia-Idade
9.
Artigo em Inglês | MEDLINE | ID: mdl-34444178

RESUMO

Muscle strength (MS) has been associated with cardiometabolic risk factors (CMR) in adolescents, however, the impact attributed to body size in determining muscle strength or whether body size acts as a confounder in this relationship remains controversial. We investigated the association between absolute MS and MS normalized for body size with CMR in adolescents. This was a cross-sectional study comprising 351 adolescents (44.4% male; 16.6 ± 1.0 years) from Brazil. MS was assessed by handgrip and normalized for body weight, body mass index (BMI), height, and fat mass. CMR included obesity, high blood pressure, dyslipidemia, glucose imbalance, and high inflammation marker. When normalized for body weight, BMI, and fat mass, MS was inversely associated with the presence of two or more CMR among females. Absolute MS and MS normalized for height was directly associated with the presence of two or more CMR among males. This study suggests that MS normalized for body weight, BMI, and fat mass can be superior to absolute MS and MS normalized for height in representing lower CMR among females. Absolute MS and MS normalized for height were related to higher CMR among males.


Assuntos
Doenças Cardiovasculares , Força da Mão , Adolescente , Índice de Massa Corporal , Fatores de Risco Cardiometabólico , Doenças Cardiovasculares/epidemiologia , Estudos Transversais , Feminino , Humanos , Masculino , Força Muscular , Fatores de Risco
10.
BMJ ; 374: n1743, 2021 08 04.
Artigo em Inglês | MEDLINE | ID: mdl-34348957

RESUMO

OBJECTIVES: To examine multiple objective and self-reported measures of motor function for their associations with mortality. DESIGN: Prospective cohort study. SETTING: UK based Whitehall II cohort study, which recruited participants aged 35-55 years in 1985-88; motor function component was added at the 2007-09 wave. PARTICIPANTS: 6194 participants with motor function measures in 2007-09 (mean age 65.6, SD 5.9), 2012-13, and 2015-16. MAIN OUTCOME MEASURES: All cause mortality between 2007 and 2019 in relation to objective measures (walking speed, grip strength, and timed chair rises) and self-reported measures (physical component summary score of the SF-36 and limitations in basic and instrumental activities of daily living (ADL)) of motor function. RESULTS: One sex specific standard deviation poorer motor function in 2007-09 (cases/total, 610/5645) was associated with an increased mortality risk of 22% (95% confidence interval 12% to 33%) for walking speed, 15% (6% to 25%) for grip strength, 14% (7% to 23%) for timed chair rises, and 17% (8% to 26%) for physical component summary score over a mean 10.6 year follow-up. Having basic/instrumental ADL limitations was associated with a 30% (7% to 58%) increased mortality risk. These associations were progressively stronger when measures were drawn from 2012-13 (mean follow-up 6.8 years) and 2015-16 (mean follow-up 3.7 years). Analysis of trajectories showed poorer motor function in decedents (n=484) than survivors (n=6194) up to 10 years before death for timed chair rises (standardised difference 0.35, 95% confidence interval 0.12 to 0.59; equivalent to a 1.2 (men) and 1.3 (women) second difference), nine years for walking speed (0.21, 0.05 to 0.36; 5.5 (men) and 5.3 (women) cm/s difference), six years for grip strength (0.10, 0.01 to 0.20; 0.9 (men) and 0.6 (women) kg difference), seven years for physical component summary score (0.15, 0.05 to 0.25; 1.2 (men) and 1.6 (women) score difference), and four years for basic/instrumental ADL limitations (prevalence difference 2%, 0% to 4%). These differences increased in the period leading to death for timed chair rises, physical component summary score, and ADL limitations. CONCLUSION: Motor function in early old age has a robust association with mortality, with evidence of terminal decline emerging early in measures of overall motor function (timed chair rises and physical component summary score) and late in basic/instrumental ADL limitations.


Assuntos
Força da Mão/fisiologia , Atividade Motora/fisiologia , Desempenho Psicomotor/fisiologia , Velocidade de Caminhada/fisiologia , Atividades Cotidianas , Adulto , Fatores Etários , Idoso , Estudos de Coortes , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Autorrelato , Taxa de Sobrevida , Fatores de Tempo , Reino Unido
11.
Artigo em Inglês | MEDLINE | ID: mdl-34353878

RESUMO

INTRODUCTION: Grip strength has been associated with chronic diseases and mortality. However, current evidence of the association between grip strength and incident type 2 diabetes mellitus (T2DM) is controversial. The aim of this study was to investigate the associations of absolute and relative grip strength with incident T2DM and whether these associations differ by sociodemographic, lifestyle and adiposity-related factors. RESEARCH DESIGN AND METHODS: This was a prospective cohort study of 166 894 participants in the UK Biobank (mean age 56.5 years, 54.4% women). The outcome was T2DM incidence and the exposure was grip strength, expressed in absolute (kg) and relative (kg per kg of body weight) values. The association between grip strength and T2DM incidence was investigated using Cox-proportional regression. RESULTS: The median follow-up was 5.3 years (IQR: 4.7-6.1). During this time, 3713 participants developed T2DM. Lower grip strength was associated with a higher risk of T2DM in both sexes. Those in the lowest quintile of absolute grip strength had a 50% higher risk in men (HR: 1.50 (95% CI: 1.30 to 1.73)) and 25% higher risk in women (HR: 1.25 (95% CI: 1.06 to 1.47)) compared with those in the highest quintile. For relative grip strength, risk of diabetes was more than double for men (HR: 2.22 (95% CI: 1.84 to 2.67)) and 96% higher for women (HR: 1.96 (95% CI: 1.52 to 2.53)) in the lowest compared with highest quintiles. CONCLUSIONS: Grip strength is associated with a higher risk of T2DM incidence in both men and women independent of important confounding factors including age, deprivation, adiposity and lifestyle. However, the associations were stronger when grip strength is expressed relative to body weight, which could reflect the importance of muscle quality.


Assuntos
Diabetes Mellitus Tipo 2 , Bancos de Espécimes Biológicos , Diabetes Mellitus Tipo 2/epidemiologia , Diabetes Mellitus Tipo 2/etiologia , Feminino , Força da Mão , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Fatores de Risco , Reino Unido/epidemiologia
12.
Appl Ergon ; 97: 103536, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34364130

RESUMO

BACKGROUND: Effective shooting performance relies heavily on sufficient grip strength. However, some standard issue pistols used by police services may have a trigger weight that causes problems for officers with insufficient grip strength, including female officers. The current study aimed to replicate previous findings, which show that grip strength is positively related to shooting performance. We also sought to determine what grip strength is required to achieve proficient scores on a standard police pistol qualification (PPQ) when a heavy trigger weight (i.e., 8lbs-12lbs) is used. Finally, we explored the relationship between officer gender and PPQ scores to determine if grip strength plays a mediating role in this relationship. METHOD: The dominant hand grip strength (in lbs) of 86 male and 32 female officers were recorded prior to their participation in their agency mandated annual PPQ. Officer gender, grip strength, and PPQ scores were analyzed to explore how they related to one another. RESULTS: Grip strength significantly impacted officers' ability to pass the PPQ, with female officers possessing lower grip strength compared to male officers, as well as achieving poorer scores on the PPQ. We determined that grip strengths in the range of 80lbs and 125lbs were needed to score approximately 85 % and 90 % on the PPQ, respectively; exceeding that of the average grip strength for the female officers in the study (M = 77.5lbs). Mediation analysis suggested that grip strength may mediate the relationship between officer gender and shooting performance, but studies with more power are needed to confirm that. CONCLUSION: To improve shooting performance as well as public and police safety, law enforcement agencies may need to consider including grip strength training in their conditioning regime or examine the adoption pistols with a lighter trigger pull weight (e.g., 6lbs).


Assuntos
Armas de Fogo , Força da Mão , Feminino , Humanos , Masculino , Polícia
13.
BMC Geriatr ; 21(1): 459, 2021 08 11.
Artigo em Inglês | MEDLINE | ID: mdl-34380435

RESUMO

BACKGROUND: This study aimed to explore the level and changes in handgrip strength among preclinical Alzheimer's disease (AD) and AD patients and to evaluate the association between handgrip strength and cognitive function. METHODS: A total of 1431 participants from the memory clinic of Shanghai JiaoTong University Affiliated Sixth People's Hospital and community were enrolled in the final analysis, including 596 AD, 288 mild cognitive impairment (MCI), and 547 normal individuals (NC). All participants received a comprehensive neuropsychological assessment. Mini-Mental State Examination (MMSE), Montreal Cognitive Assessment-Basic (MoCA-BC), and the Chinese version of Addenbrooke's Cognitive Examination III (ACE-III-CV) were used as cognitive tests. The receiver operating characteristic curve (ROC) was plotted to assess the power of handgrip strength as a screening measure to discriminate AD and MCI. RESULTS: The results showed that handgrip strength in the MCI group was significantly lower than that of NC group, and the AD group had a further decline (both P < 0.01). Multivariate logistic regression was performed with the handgrip strength quartiles, and the results showed that the ORs of AD for increasing levels of handgrip strength were 1.00, 0.58 (0.46-0.78), 0.51 (0.36-0.73), and 0.50 (0.35-0.68), showing a decreasing trend (Pfor trend < 0.01). The ROC curve demonstrated that the handgrip strength cutoff points for the identification of AD were 16.8 and 20.7 kg among the female participants above and under 70 yrs and 24.4 and 33.3 kg for the male participants above and under 70 yrs, respectively. Similarly, for the identification of MCI, cutoff points were 17.5 and 21.9 kg for females above 70 yrs and under 70 yrs, and 25.8 and 36.2 kg for males above 70 yrs and under 70 yrs, respectively. CONCLUSIONS: Our study provided the further knowledge on the relationship between noncognitive features and cognition in populations with differing cognitive status, revealed that the stronger handgrip strength was associated with better performances on cognitive function. It can be speculated that handgrip strength can help early recognition of Chinese AD patients.


Assuntos
Doença de Alzheimer , Disfunção Cognitiva , Doença de Alzheimer/diagnóstico , Doença de Alzheimer/epidemiologia , China/epidemiologia , Cognição , Disfunção Cognitiva/diagnóstico , Disfunção Cognitiva/epidemiologia , Feminino , Força da Mão , Humanos , Masculino , Testes Neuropsicológicos , Curva ROC
14.
Sensors (Basel) ; 21(16)2021 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-34450741

RESUMO

Anthropomorphic robotic hands are designed to attain dexterous movements and flexibility much like human hands. Achieving human-like object manipulation remains a challenge especially due to the control complexity of the anthropomorphic robotic hand with a high degree of freedom. In this work, we propose a deep reinforcement learning (DRL) to train a policy using a synergy space for generating natural grasping and relocation of variously shaped objects using an anthropomorphic robotic hand. A synergy space is created using a continuous normalizing flow network with point clouds of haptic areas, representing natural hand poses obtained from human grasping demonstrations. The DRL policy accesses the synergistic representation and derives natural hand poses through a deep regressor for object grasping and relocation tasks. Our proposed synergy-based DRL achieves an average success rate of 88.38% for the object manipulation tasks, while the standard DRL without synergy space only achieves 50.66%. Qualitative results show the proposed synergy-based DRL policy produces human-like finger placements over the surface of each object including apple, banana, flashlight, camera, lightbulb, and hammer.


Assuntos
Procedimentos Cirúrgicos Robóticos , Robótica , Dedos , Mãos , Força da Mão , Humanos
15.
F1000Res ; 10: 184, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34354813

RESUMO

Background: Methods which potentially could prevent age-related loss of muscle mass and function are still being sought. There are various attempts to use pharmacological agents to prevent loss of muscle mass, but the effectiveness of many of them still needs to be confirmed. One of the promising therapeutics are Angiotensin Converting Enzyme Inhibitors (ACEIs) and lowering of serum ACE activity. The goal of this study was to assess if taking Angiotensin Converting Enzyme Inhibitors (ACEI) and other angiotensin system blocking medications (ASBMs) can modify muscle performance in older men as well as to assess the association of serum ACE activity with muscle strength, power, muscle contraction velocity and functional performance. Methods: Seventy-nine older men took part in the study. Muscle function was assessed with hand grip strength, maximum power relative to body mass (Pmax) and optimal shortening velocity (Ʋopt) of the knee extensor muscles. Anthropometric data, ACE activity and functional performance were also measured. Results: Negative correlations between ACE activity and Pmax (rho=-0.29, p=0.04) as well as Ʋopt  (rho=-0.31, p=0.03) in a group of patients not taking ACEI and between ACE activity and Ʋopt (rho=-0.22, p=0.05) in the whole group of men were found. Positive relationship between age and ACE activity was demonstrated (rho=0.26, p=0.02). Age was the only selected variable in the multiple regression analyses to determine both Pmax and Ʋopt. Conclusions: Taking ACEI is not associated with a functional performance in older men of the same age and with the same anthropometric parameters. Serum ACE activity negatively associates to muscle power and muscle contraction velocity.


Assuntos
Peptidil Dipeptidase A , Músculo Quadríceps , Idoso , Força da Mão , Humanos , Masculino , Contração Muscular , Força Muscular
16.
Artigo em Inglês | MEDLINE | ID: mdl-34444047

RESUMO

Sarcopenia is a geriatric syndrome which is likely to cause disability, body unbalance, and mortality and thus can lead to heavy healthcare expenditure and caregiver burden. Although some studies have addressed the prevalence of sarcopenia for older adults, there are limited studies conducted in daycare centers. The present study aimed to (i) estimate the prevalence of sarcopenia and (ii) explore associated factors of sarcopenia and standing balance among older adults admitted to daycare centers in Taiwan. The cross-sectional study collected data on demographics, health status, handgrip strength, gait speed (GS), skeletal muscle mass, Taiwan-Mini Nutritional Assessment Short-Form (TW-MNA-SF), and Short Physical Performance Battery from daycare centers in northern Taiwan. The definition of sarcopenia followed the Asian Working Group for Sarcopenia 2019 guidelines. Among 173 participants ≥65 year-old, 50.9% had confirmed sarcopenia, 47.4% possible sarcopenia, and 1.7% normal. Results showed that calf circumference, TW-MNA-SF, dementia, and body mass index (BMI) were associated with sarcopenia. Moreover, BMI, GS, and sarcopenia were associated factors of standing balance. The study estimated a high prevalence of sarcopenia in daycare centers and identified some significant factors of sarcopenia and standing balance. Early nutritional and physiotherapy interventions could benefit older adults to prevent sarcopenia or unbalance.


Assuntos
Sarcopenia , Idoso , Estudos Transversais , Avaliação Geriátrica , Força da Mão , Humanos , Força Muscular , Prevalência , Fatores de Risco , Sarcopenia/epidemiologia , Taiwan/epidemiologia
17.
Artigo em Inglês | MEDLINE | ID: mdl-34444395

RESUMO

Early childhood education aims to achieve the motor, cognitive, emotional, and social development of preschoolers by providing them with a variety of learning opportunities. The square-stepping exercise (SSE) is a balance and lower limb strength training programme used to prevent falls and stimulate cognitive function in older adults. This project aims to propose an SSE tele-exercise (Tele-SSE) protocol to evaluate its effects on the motor and cognitive development of children aged between 3 and 6 years. A randomized controlled trial with experimental (Tele-SSE) and control (general education) groups will be carried out. The application of Tele-SSE will be performed for 9 months (three times per week) and one additional follow-up after the intervention at the beginning of the next academic year. One-hundred and two preschoolers will be recruited and randomly distributed into the two groups: experimental (n = 51) and control (n = 51). Although the main outcome will be balance due to the nature of the SSE, outcomes will include physical and motor (body mass index, waist circumference, handgrip and lower-limb strength, speed-agility, and cardiorespiratory fitness) and cognitive (executive functions and attention, episodic memory, and language assessment, using the Fitness Assessment in the Preschool Battery (PREFIT) and The National Institutes of Health Toolbox-Early Childhood Cognition Battery. This project aims to improve cognitive and motor skills in preschoolers aged between 3 and 6 years old, based on a 9-month Tele-SSE intervention. If this intervention proves to be effective, it could be implemented in those centres, entities and associations specializing in early childhood education.


Assuntos
Exercício Físico , Força da Mão , Acidentes por Quedas , Idoso , Criança , Pré-Escolar , Cognição , Terapia por Exercício , Humanos , Lactente , Ensaios Clínicos Controlados Aleatórios como Assunto
18.
Medicina (Kaunas) ; 57(8)2021 Aug 17.
Artigo em Inglês | MEDLINE | ID: mdl-34441040

RESUMO

Background and Objectives: Kidney transplant recipients represent a unique population with metabolic abnormalities, altered nutritional and immune status, as well as an imbalanced regulation of adipocytokine metabolism. Leptin is a hormonally active protein mainly produced by fat tissue that modulates appetite, satiety, and influences growth, energy, and bone metabolism. There has been great interest in the role of this hormone in chronic kidney disease-related protein energy wasting; thus, a positive leptin correlation with body mass index and fat mass was confirmed. This study was designed to determine the association of pre and post-kidney transplant leptin concentration with nutritional status and body composition. Materials and Methods: We studied 65 kidney transplant recipients. Nutritional status was evaluated before kidney transplantation and 6 months later using three different malnutrition screening tools (Subjective Global Assessment Scale (SGA), Malnutrition Inflammation Score (MIS), and Geriatric Nutritional Risk Index (GNRI)), anthropometric measurements, and body composition (bioelectrical impedance analysis (BIA)). Demographic profile, serum leptin levels, and other biochemical nutritional markers were collected. Statistical analysis was performed with R software. Results: Median age of the studied patients was 45 years, 42% were females, and 12% had diabetes. Leptin change was associated with body weight (p < 0.001), waist circumference (p < 0.001), fat mass (p < 0.001) and body fat percentage (p < 0.001), decrease in parathyroid hormone (PTH) (p < 0.001) transferrin (p < 0.001), diabetes mellitus (p = 0.010), and residual renal function (p = 0.039), but not dependent on dialysis vintage, estimated glomerular filtration rate (eGFR), or delayed graft function at any time during the study. After adjustment for age and sex, body mass index (BMI) (p < 0.001), fat mass (p < 0.001), and body fat percentage (p < 0.001) were independent variables significantly associated with post-transplant leptin change. Lower leptin values were found both before and after kidney transplantation in the SGA B group. GNRI as a nutritional status tool was strongly positively related to changes in leptin within the 6-month follow-up period. Conclusions: Kidney transplant recipients experience change in leptin concentration mainly due to an increase in fat mass and loss of muscle mass. GNRI score as compared to SGA or MIS score identifies patients in whom leptin concentration is increasing alongside an accumulation of fat and decreasing muscle mass. Leptin concentration evaluation in combination with BIA, handgrip strength measurement, and GNRI assessment are tools of importance in defining nutrition status in the early post-kidney transplant period.


Assuntos
Transplante de Rim , Leptina , Índice de Massa Corporal , Feminino , Força da Mão , Humanos , Masculino , Pessoa de Meia-Idade , Estado Nutricional , Diálise Renal
19.
BMJ Open ; 11(8): e048629, 2021 08 23.
Artigo em Inglês | MEDLINE | ID: mdl-34426464

RESUMO

INTRODUCTION: Dynapenia is a new term that is used to describe the age-related loss of muscle strength. Flexi-bar training is a safe and feasible device for older people with dynapenia. This study will investigate the effects of a 12-week flexi-bar training programme on muscle strength and physical function in older people with dynapenia. METHODS AND ANALYSIS: A total of 114 participants (aged more than 65 years) with age-related muscle loss will participate in a 12-week flexi-bar training programme. The participants will be randomly divided into three groups, namely, flexi-bar, placebo and control, with equal number of participants in each group. The assessments will be conducted at preintervention, postintervention and 12 weeks after training completion. The primary outcome is timed-up-and-go test. The secondary outcomes are five-repetition sit-to-stand test, 10-metre walking test, handgrip strength, as well as the serum albumin and haemoglobin levels. ETHICS AND DISSEMINATION: The procedures of this study were reviewed and approved by the Human Ethics Review Board of Wuhan Brain Hospital (General Hospital of the Yangtze River Shipping) on 29 September 2020 (#L20200013). The findings of this study will be published in peer-reviewed journals and presented at conferences. The trial was registered on 6 November 2020. TRIAL REGISTRATION NUMBER: ISRCTN14316668.


Assuntos
Força da Mão , Equilíbrio Postural , Idoso , Humanos , Força Muscular , Desempenho Físico Funcional , Ensaios Clínicos Controlados Aleatórios como Assunto , Estudos de Tempo e Movimento
20.
Comput Intell Neurosci ; 2021: 5512728, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34335718

RESUMO

Grasp detection based on convolutional neural network has gained some achievements. However, overfitting of multilayer convolutional neural network still exists and leads to poor detection precision. To acquire high detection accuracy, a single target grasp detection network that generalizes the fitting of angle and position, based on the convolution neural network, is put forward here. The proposed network regards the image as input and grasping parameters including angle and position as output, with the detection manner of end-to-end. Particularly, preprocessing dataset is to achieve the full coverage to input of model and transfer learning is to avoid overfitting of network. Importantly, a series of experimental results indicate that, for single object grasping, our network has good detection results and high accuracy, which proves that the proposed network has strong generalization in direction and category.


Assuntos
Força da Mão , Redes Neurais de Computação
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