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1.
Mymensingh Med J ; 29(1): 169-176, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31915354

RESUMO

This cross sectional analytical type of study was conducted at department of Anatomy, Dhaka Medical College, Dhaka, Bangladesh from July 2015 to June 2016 on 50 adult Bangladeshi male sprinters (Group A) and 50 adult Bangladeshi male cricket batsman (Group B). Sample collection was done by convenient purposive sampling technique. History of any injury of hand during playing was excluded to construct standard measurement. Hand breadth was measured with the help of slide calipers. Hand grip strength Dynamometer was used to measure the hand grip strength. Paired Student's 't' test, unpaired student's 't' test and Pearson's correlation coefficient test were done for statistical analysis of the result. The aim of the present study was to determine hand breadth and average hand grip strength of Bangladeshi male cricket batsman to find out correlation between them that may be used as a baseline for other professions as well for future research in our country. The mean right and left hand grip strength was significantly higher in the cricket batsman than in the sprinters. The mean right and left hand breadth was found to be significantly higher in the cricket batsman than in the sprinters. Right and left hand grip strength showed significant positive correlation with hand breadth in both hand. The study findings suggest that regular physical exercise and training increase hand grip strength.


Assuntos
Força da Mão , Mãos/anatomia & histologia , Adulto , Animais , Antropometria , Grupo com Ancestrais do Continente Asiático , Atletas , Bangladesh , Estudos Transversais , Grupos Étnicos , Humanos , Masculino , Dinamômetro de Força Muscular , Corrida
4.
World Neurosurg ; 133: 42-48, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31550542

RESUMO

BACKGROUND: Navigated transcranial magnetic stimulation (nTMS) is being used for different purposes in patients with brain tumors. However, the procedure requires a positive electrophysiological response. For patients with negative response in rest conditions, active motor threshold (AMT) may be used. However, sometimes it is difficult to obtain AMT measures owing to inability of the patient to sustain steady muscle contraction. Herein, we describe a simple method by using a hand dynamometer to obtain AMT measures during nTMS session. CASE DESCRIPTION: A woman aged 68 years underwent total removal of a right frontal lobe oligodendroglioma World Health Organization grade II 15 years ago. Cranial magnetic resonance imaging during follow-up revealed local recurrence. In the postoperative period, she developed left upper limb paresis. A postoperative nTMS session was performed for motor electrophysiological evaluation. However, using the standard technique for AMT measurement, the patient was unable to perform sustained muscle contraction as required. A hand dynamometer was used. It allowed sustained muscle contraction for AMT measurement. A counter force for the index finger flexion, the hand support to stabilize hand joints, and a numerical screen serving for both the examiner and the patient as a feedback parameter may explain the success obtained with this simple device. CONCLUSIONS: Although more studies are necessary to validate the method, the hand dynamometer should be considered for patients unable to sustain muscle contraction during AMT measurement.


Assuntos
Lobo Frontal/fisiopatologia , Córtex Motor/fisiopatologia , Contração Muscular/fisiologia , Dinamômetro de Força Muscular , Recidiva Local de Neoplasia/fisiopatologia , Oligodendroglioma/fisiopatologia , Estimulação Magnética Transcraniana/métodos , Idoso , Mapeamento Encefálico , Feminino , Lobo Frontal/diagnóstico por imagem , Lobo Frontal/cirurgia , Humanos , Recidiva Local de Neoplasia/diagnóstico por imagem , Recidiva Local de Neoplasia/cirurgia , Oligodendroglioma/diagnóstico por imagem , Oligodendroglioma/cirurgia
5.
Sports Biomech ; 19(1): 26-54, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29895216

RESUMO

The aim of this study was to conduct a systematic review to determine the quality of evidence of studies assessing isokinetic hip muscle strength in adult non-injured individuals. We also aimed to summarise and pool data of normative values for hip muscle strength. The influence of methodological and participant-related factors on hip strength performance was explored as well. Guidelines proposed in the PRISMA were used to undertake a search strategy involving the keyword 'hip' associated with a set of keywords reflecting muscle strength. Five databases were searched: ProQuest, PubMed, Science Direct, Scopus and Web of Science. From the 2,939 records initially retained, 28 articles were included in this systematic review. Eight articles were classified as high quality. This systematic review exposed the methodological fragility of most studies assessing hip strength in non-injured adult population. Only data from studies with a small number of participants are available to be used as reference. A few individual studies suggest no differences in torque parameters between dominant and non-dominant lower limbs; differences in torque parameters between age groups; and between male and female participants. Overall, reference values for hip muscle performance in isokinetic tests are mostly unclear.


Assuntos
Quadril/fisiologia , Força Muscular/fisiologia , Adulto , Fatores Etários , Fenômenos Biomecânicos , Exercício/fisiologia , Humanos , Dinamômetro de Força Muscular , Valores de Referência , Projetos de Pesquisa/normas , Fatores Sexuais , Torque
6.
Rev Med Chil ; 147(6): 741-750, 2019 Jun.
Artigo em Espanhol | MEDLINE | ID: mdl-31859827

RESUMO

BACKGROUND: A low hand grip strength is a prognostic factor both in healthy people and hospitalized subjects. Local normal hand grip strength values are needed to define cutoff points of abnormality. AIM: To measure handgrip strength in Chilean people aged 20 to 70 years and propose normal values for healthy people in this age range. MATERIAL AND METHODS: Handgrip strength was measured using a JAMAR hydraulic dynamometer in 436 males and 465 females aged 20 to 70 years and who were free of disease. They were recruited from waiting rooms in several public and private hospitals and outpatient clinics, under self-evaluation of inclusion criteria. RESULTS: The variability of the handgrip strength in women was smaller in than men. Tables containing handgrip strength values by age and sex and the ranges between three standard deviations were prepared. CONCLUSIONS: This study contributes with normal handgrip strength values in Chile to be used for the diagnosis and management of various conditions, such sarcopenia, obesity, oncological patients, Intensive Care Unit acquired weakness (ICU-aw) and weaning of mechanical ventilation.


Assuntos
Força da Mão/fisiologia , Adulto , Fatores Etários , Idoso , Chile , Feminino , Humanos , Modelos Lineares , Masculino , Pessoa de Meia-Idade , Dinamômetro de Força Muscular , Padrões de Referência , Valores de Referência , Fatores Sexuais , Estatísticas não Paramétricas , Adulto Jovem
7.
Neurology ; 93(21): e1932-e1943, 2019 11 19.
Artigo em Inglês | MEDLINE | ID: mdl-31653707

RESUMO

OBJECTIVE: To identify the rate of change of clinical outcome measures in children with 2 types of congenital muscular dystrophy (CMD), COL6-related dystrophies (COL6-RDs) and LAMA2-related dystrophies (LAMA2-RDs). METHODS: Over the course of 4 years, 47 individuals (23 with COL6-RD and 24 with LAMA2-RD) 4 to 22 years of age were evaluated. Assessments included the Motor Function Measure 32 (MFM32), myometry (knee flexors and extensors, elbow flexors and extensors), goniometry (knee and elbow extension), pulmonary function tests, and quality-of-life measures. Separate linear mixed-effects models were fitted for each outcome measurement, with subject-specific random intercepts. RESULTS: Total MFM32 scores for COL6-RDs and LAMA2-RDs decreased at a rate of 4.01 and 2.60 points, respectively, each year (p < 0.01). All muscle groups except elbow flexors for individuals with COL6-RDs decreased in strength between 1.70% (p < 0.05) and 2.55% (p < 0.01). Range-of-motion measurements decreased by 3.21° (p < 0.05) at the left elbow each year in individuals with LAMA2-RDs and 2.35° (p < 0.01) in right knee extension each year in individuals with COL6-RDs. Pulmonary function demonstrated a yearly decline in sitting forced vital capacity percent predicted of 3.03% (p < 0.01) in individuals with COL6-RDs. There was no significant change in quality-of-life measures analyzed. CONCLUSION: Results of this study describe the rate of change of motor function as measured by the MFM32, muscle strength, range of motion, and pulmonary function in individuals with COL6-RDs and LAMA2-RDs.


Assuntos
Distrofias Musculares/fisiopatologia , Esclerose/fisiopatologia , Adolescente , Artrometria Articular , Criança , Pré-Escolar , Progressão da Doença , Nutrição Enteral , Feminino , Humanos , Modelos Lineares , Estudos Longitudinais , Masculino , Limitação da Mobilidade , Força Muscular , Dinamômetro de Força Muscular , Qualidade de Vida , Testes de Função Respiratória , Capacidade Vital , Adulto Jovem
8.
Fisioterapia (Madr., Ed. impr.) ; 41(5): 299-302, sept.-oct. 2019. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-183939

RESUMO

Antecedentes y objetivo: La tenosinovitis estenosante (TE) es un trastorno inflamatorio que afecta a vainas y tendones flexores de los dedos. Los tratamientos no quirúrgicos presentan una efectividad limitada. Se ha evidenciado que las ondas de choque (OC) extracorpóreas reducen la presencia de fenómenos inflamatorios crónicos. Dado sus efectos, se postula como una alternativa al tratamiento de la TE. El objetivo de este trabajo es presentar el caso de una paciente con TE la cual fue tratada mediante OC. Descripción: Mujer de 77 años, jubilada, con diagnóstico de TE del tercer dedo de la mano derecha, presenta dolor palmar y chasquido asociado a bloqueo del dedo al realizar actividades que involucren flexoextensión. Se evaluó la intensidad del dolor, umbral de dolor a la presión, capacidad funcional, rango de movimiento, fuerza prensil y de pinza. Intervención: Se realizaron 6 sesiones de tratamiento con una frecuencia de una sesión/semana utilizando una programación de 2.000 pulsos, 6 Hz y 2,2 bar. No se realizó ningún otro tipo de intervención. Resultados: Se evidenció una reducción en la intensidad del dolor, aumento en el umbral del dolor a la presión, rango de movimiento, capacidad funcional, fuerza prensil y de pinza, así como cambios en el aspecto ecográfico de la polea y tendón afectados. Conclusión: La aplicación de OC presentó resultados positivos en el tratamiento de la paciente. En consecuencia, podría ser una opción para el manejo de sujetos con TE


Background and objective: Stenosing tenosynovitis (ST) is an inflammatory disorder that affects the sheaths and tendons of the flexor muscles of the fingers. Conservative treatments have limited effectiveness. It has been shown that extracorporeal shockwave therapy (ESWT) reduces the presence of chronic inflammatory phenomena. Given its effects, it is postulated as treatment alternative for stenosing tenosynovitis. The aim of this report is to present the case of a patient with ST which was treated with ESWT. Description: 77-year-old woman, retired, diagnosed with ST of the third right finger. The patient presented with palmar pain and clicking associated with finger lock when performing activities involving flexion-extension. Pain intensity, pressure pain threshold, functional capacity, range of motion, grip and pinch muscle strength were evaluated. Intervention: Six sessions of treatment were performed with a frequency of 1 session/week using a programming of 2000 pulses, 6 Hz and 2.2 bar. No other intervention was performed. Results: Reduction in the intensity of the pain, increase in pressure pain threshold, range of motion, functional capacity, grip and pinch force, as well as changes in the echographic appearance of the affected pulley and tendon were observed. Conclusion: Application of ESWT presented positive results in this patient. It could therefore be an option for the management of subjects with ST


Assuntos
Humanos , Feminino , Idoso , Ondas de Choque de Alta Energia/uso terapêutico , Tenossinovite/terapia , Limiar da Dor/fisiologia , Medição da Dor/métodos , Inquéritos e Questionários , Dinamômetro de Força Muscular
9.
Nutr. hosp ; 36(5): 1055-1060, sept.-oct. 2019. tab
Artigo em Espanhol | IBECS | ID: ibc-184626

RESUMO

Introducción: el sobrepeso y la obesidad alcanzan una alta prevalencia desde la infancia en España. Objetivo: describir el efecto del sobrepeso y la obesidad en niños escolares de once años de edad, en pruebas que valoran la fuerza, tanto de las extremidades inferiores como de las superiores, así como la velocidad. Método: participaron en el estudio 423 escolares de once años de edad. Se obtuvieron características básicas antropométricas y desarrollaron diversos test de la batería EUROFIT. Resultados: los niños y niñas que se encuentran en normopeso poseen mejores puntuaciones en las pruebas de condición física en general. De este modo, los saltos verticales y horizontales, suspensión en barra y abdominales son superiores en los participantes con normopeso (p < 0,05). Además, recorren en menos tiempo un circuito de velocidad en ambos sexos (p < 0,001); sin embargo, en la fuerza isométrica manual, en el grupo de niñas poseen mejores resultados aquellas que se encuentran en sobrepeso u obesidad (p < 0,01). Conclusiones: los niños de once años con sobrepeso y obesidad muestran una menor prestación muscular, salvo en el caso de la fuerza isométrica manual. También se han determinado diversas ecuaciones de predicción de resultados de las pruebas físicas llevadas a cabo, como saltos, dinamometría y velocidad, a través del sexo e índice de masa corporal (IMC)


Introduction: overweight and obesity reach a high prevalence since childhood in Spain. Objective: to describe the effect of overweight and obesity, in schoolchildren of eleven years of age, in tests that assess the strength of both the lower and upper extremities, as well as speed. Method: four hundred and twenty-three schoolchildren of eleven years of age participated in the study. Basic anthropometric characteristics were obtained and several tests of the EUROFIT battery were developed. Results: normal-weight boys and girls had better scores in physical condition tests in general. Therefore, the vertical and horizontal jumps, bar suspension and abdominals were higher in the participants with normal-weight (p < 0.05). In addition, they performed in less time a speed circuit in both sexes (p < 0.001); however, in relation to the manual isometric strength, in the group of girls those who are overweight or obese have better results (p < 0.01). Conclusions: overweight and obese children of eleven year-olds showed a lower muscular performance, except in the case of manual isometric strength. Several equations haven been also determined for predicting the results of physical tests carried out such as jumps, dynamometry and speed, through sex and body mass index (BMI)


Assuntos
Humanos , Masculino , Feminino , Criança , Obesidade Pediátrica/epidemiologia , Sobrepeso/epidemiologia , Força Muscular/fisiologia , Dinamômetro de Força Muscular , Obesidade Pediátrica/complicações , Sobrepeso/complicações , Índice de Massa Corporal , Análise de Classes Latentes
10.
Fisioter. Pesqui. (Online) ; 26(3): 298-303, jul.-set. 2019. tab, graf
Artigo em Português | LILACS | ID: biblio-1039893

RESUMO

RESUMO O medo de quedas pode fazer com que o idoso desenvolva estratégias que alteram o equilíbrio semiestático e dinâmico, predispondo-o a um risco aumentado de cair. A função muscular dos abdutores e adutores de quadril tem importante papel na manutenção da estabilidade postural. Entretanto, não se sabe se idosos com medo de cair apresentam maior comprometimento na função muscular do quadril. Assim, o objetivo foi comparar o pico de torque (PT) isométrico dos músculos abdutores e adutores de quadril entre idosos com e sem medo de quedas. Os participantes foram divididos em dois grupos: com (n=81) e sem (n=81) medo de quedas. O PT dos abdutores e adutores de quadril foi obtido com dinamômetro isocinético (System 4 Pro, Biodex, Nova York, EUA). A comparação do PT dos grupos foi realizada por meio de modelo linear geral univariado, ajustado pelas covariáveis idade, sexo, índice de massa corporal, nível de atividade física e histórico de quedas, utilizando o software SPSS 17.0, com nível de significância de 5%. Não houve diferença do PT abdutor e adutor do quadril entre os grupos após análise univariada com ajustamento. Observou-se que idosos com medo de quedas não apresentam prejuízos na função muscular dos estabilizadores de quadril quando comparados a idosos sem medo de quedas.


RESUMEN El miedo a caerse puede hacer que los ancianos desarrollen estrategias de alteración del equilibrio semiestático y dinámico, predisponiéndolos a un mayor riesgo de caídas. La función muscular de los abductores y de los aductores de cadera juega un papel importante en el mantenimiento de la estabilidad postural. Sin embargo, no se sabe si los ancianos con miedo a caerse tienen un mayor deterioro en la función muscular de la cadera. Por lo tanto, el objetivo fue comparar el torque máximo (TM) isométrico de los músculos abductores y aductores de cadera entre los ancianos con miedo y sin miedo a caerse. Los participantes se dividieron en dos grupos: con miedo a caerse (n=81) y sin (n=81) miedo a caerse. El TM de los abductores y aductores de cadera se obtuvo mediante la utilización del dinamómetro isocinético (System 4 Pro, Biodex, Nueva York, EE.UU.). La comparación del TM de los grupos se realizó mediante un modelo lineal general univariado, ajustado por covariables edad, género, índice de masa corporal, nivel de actividad física e historial de caídas, utilizando el software SPSS 17.0, con nivel de significancia del 5%. No hubo diferencias entre el TM del abductor y del aductor de cadera entre los grupos tras el análisis univariado con ajuste. Se observó que los ancianos con miedo a caerse no presentaron daños en la función muscular de los estabilizadores de la cadera en comparación con los ancianos sin miedo a caerse.


ABSTRACT The fear of falling can cause older adults to develop strategies that alter the semi-static and dynamic balance, predisposing them to increased risk of falling. The muscular function of abductors and adductors plays an important role in maintaining postural stability. However, it is unknown whether older people with fear of falling have greater impairment in hip muscular function. Thus, the objective was to compare the isometric peak torque (PT) of hip abductor and adductor muscles among older adults with and without fear of falling. Participants were divided into two groups: with (n=81) and without (n=81) fear of falling. The PT of hip abductors and adductors was obtained with isokinetic dynamometer (System 4 Pro, Biodex, New York, USA). The PT groups were compared using general linear model univariate, adjusted for covariates age, sex, body mass index, physical activity level and history of falls, using the SPSS 17.0 software, with a significance level of 5%. No difference was found between the PT of hip abductor and adductor and the groups after univariate analysis with adjustment. We observed that older people with fear of falling have no muscle function loss of the hip stabilizers when compared with subjects without fear of falling.


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Idoso , Torque , Força Muscular/fisiologia , Quadril/fisiologia , Acidentes por Quedas , Estudos Transversais , Equilíbrio Postural/fisiologia , Dinamômetro de Força Muscular , Medo/fisiologia
11.
BMC Musculoskelet Disord ; 20(1): 360, 2019 Aug 07.
Artigo em Inglês | MEDLINE | ID: mdl-31391035

RESUMO

BACKGROUND: Strength testing of the serratus anterior muscle with hand held dynamometry (HDD) in supine subjects has low reproducibility, and is influenced by compensatory activity of other muscles like the pectoralis major and upper trapezius. Previously, two manual maximum voluntary isometric contraction tests of the serratus anterior muscle were reported that recruited optimal surface electromyography (sEMG) activity in a sitting position. We adapted three manual muscle tests to make them suitable for HHD and investigated their validity and reliability. METHODS: Twenty-one healthy adults were examined by two assessors in one supine and two seated positions. Each test was repeated twice. Construct validity was determined by evaluating force production (assessed with HHD) in relation to sEMG of the serratus anterior, upper trapezius and pectoralis major muscles, comparing the three test positions. Intra- and interrater reliability were determined by calculating intra-class correlation coefficients (ICC) smallest detectable change (SDC) and standard error of measurement (SEM). RESULTS: Serratus anterior muscle sEMG activity was most isolated in a seated position with the humerus in 90° anteflexion in the scapular plane. This resulted in the lowest measured force levels in this position with a mean force of 296 N (SEM 15.8 N). Intrarater reliability yielded an ICC of 0.658 (95% CI 0.325; 0.846) and an interrater reliability of 0.277 (95% CI -0.089;0.605). SDC was 127 Newton, SEM 45.8 Newton. CONCLUSION: The results indicate that validity for strength testing of the serratus anterior muscle is optimal with subjects in a seated position and the shoulder flexed at 90° in the scapular plane. Intrarater reliability is moderate and interrater reliability of this procedure is poor. However the high SDC values make it difficult to use the measurement in repeated measurements.


Assuntos
Dinamômetro de Força Muscular , Força Muscular , Músculo Esquelético/fisiologia , Ombro/fisiologia , Adulto , Eletromiografia , Feminino , Voluntários Saudáveis , Humanos , Contração Isométrica/fisiologia , Masculino , Reprodutibilidade dos Testes , Lesões do Ombro/diagnóstico , Postura Sentada , Decúbito Dorsal , Adulto Jovem
12.
Hand Surg Rehabil ; 38(5): 293-297, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31386926

RESUMO

Many instruments exist for measuring grip strength. The Jamar hydraulic hand dynamometer is currently the gold standard. The Labin is a prototype electronic dynamometer that can also measure maximum grip strength. The main objective was to compare the Labin dynamometer with the gold standard instrument, the Jamar, in a healthy population, and secondarily to compare discomfort during use. A single-center exploratory study was conducted. The subjects enrolled had to be aged between 20 and 60, be volunteers and give consent. The required number of subjects was 30. The subjects were positioned according to American Society of Hand Therapists recommendations. Maximum grip force was measured in kilograms using the mean of three successive trials. The first dynamometer used was chosen randomly. The handle's discomfort during use was rated on a simple verbal scale from 0 to 10. Thirty-four subjects were included. The concordance coefficient for peak torque between the Labin and Jamar dynamometers was 0.90 for the dominant hand and 0.83 for the non-dominant hand. The intraclass correlation coefficient for peak torque with the Labin was 0.81 [0.69; 0.89] for the dominant hand and 0.86 [0.76; 0.92] for the non-dominant hand. In our study, we have shown that the Labin prototype has acceptable validity and reproducibility. The Labin will need to be tested in pathological conditions next.


Assuntos
Força da Mão , Dinamômetro de Força Muscular , Adulto , Estudos Cross-Over , Feminino , Voluntários Saudáveis , Humanos , Masculino , Psicometria , Reprodutibilidade dos Testes
13.
Artigo em Inglês | MEDLINE | ID: mdl-31369394

RESUMO

Background Caffeinated coffee, a psycho-stimulant, is widely consumed throughout the globe. However, its chronic consumption has deleterious effects on human health. Meanwhile, decaffeinated coffee has low content of caffeine and thus can be an alternative to caffeinated coffee. Therefore, the study was undertaken to explore and compare the acute effects of decaffeinated and caffeinated coffee on reaction time, mood and skeletal muscle strength in healthy volunteers. Methods This was a prospective, interventional, comparative type of study. The study included 70 healthy adults divided into two groups (Caffeinated coffee group and Decaffeinated coffee group). The following parameters were assessed: reaction time was assessed by digital display multiple-choice apparatus, mood by Visual Analogue Scale (VAS) and Profile of Mood States revised version (POMS) and skeletal muscle strength by hand dynamometer. All parameters in both groups were assessed pre-intervention (baseline) and 30 min post-intervention. Results In both groups (decaffeinated and caffeinated coffee) post-intervention, there was a statistically significant (p < 0.05) improvement in the reaction time (VRT) and mood (VAS, POMS) from the baseline. However, both groups did not show any significant effects on the skeletal muscle strength. Upon comparing the two groups, we found that caffeinated coffee showed higher and significant improvement of mood than decaffeinated coffee. Conclusions Decaffeinated coffee exerts an acute significant stimulatory effect on the reaction time and mood. However, these effects in comparison to caffeinated coffee are low. Further randomized control clinical trials are thus needed to validate these interesting findings.


Assuntos
Afeto/efeitos dos fármacos , Cafeína/farmacologia , Café/química , Força Muscular/efeitos dos fármacos , Músculo Esquelético/efeitos dos fármacos , Músculo Esquelético/fisiologia , Tempo de Reação/efeitos dos fármacos , Adolescente , Adulto , Método Duplo-Cego , Feminino , Voluntários Saudáveis , Humanos , Masculino , Dinamômetro de Força Muscular , Estudos Prospectivos , Adulto Jovem
14.
Bone Joint J ; 101-B(7): 867-871, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31256676

RESUMO

AIMS: Improvements in the evaluation of outcomes following peripheral nerve injury are needed. Recent studies have identified muscle fatigue as an inevitable consequence of muscle reinnervation. This study aimed to quantify and characterize muscle fatigue within a standardized surgical model of muscle reinnervation. PATIENTS AND METHODS: This retrospective cohort study included 12 patients who underwent Oberlin nerve transfer in an attempt to restore flexion of the elbow following brachial plexus injury. There were ten men and two women with a mean age of 45.5 years (27 to 69). The mean follow-up was 58 months (28 to 100). Repeated and sustained isometric contractions of the elbow flexors were used to assess fatigability of reinnervated muscle. The strength of elbow flexion was measured using a static dynamometer (KgF) and surface electromyography (sEMG). Recordings were used to quantify and characterize fatigability of the reinnervated elbow flexor muscles compared with the uninjured contralateral side. RESULTS: The mean peak force of elbow flexion was 7.88 KgF (sd 3.80) compared with 20.65 KgF (sd 6.88) on the contralateral side (p < 0.001). Reinnervated elbow flexor muscles (biceps brachialis) showed sEMG evidence of fatigue earlier than normal controls with sustained (60-second) isometric contraction. Reinnervated elbow flexor muscles also showed a trend towards a faster twitch muscle fibre type. CONCLUSION: The assessment of motor outcomes must involve more than peak force alone. Reinnervated muscle shows a shift towards fast twitch fibres following reinnervation with an earlier onset of fatigue. Our findings suggest that fatigue is a clinically relevant characteristic of reinnervated muscle. Adoption of these metrics into clinical practice and the assessment of outcome could allow a more meaningful comparison to be made between differing forms of treatment and encourage advances in the management of motor recovery following nerve transfer. Cite this article: Bone Joint J 2019;101-B:867-871.


Assuntos
Plexo Braquial/lesões , Fadiga Muscular , Músculo Esquelético/fisiopatologia , Transferência de Nervo , Traumatismos dos Nervos Periféricos/cirurgia , Complicações Pós-Operatórias/diagnóstico , Adulto , Idoso , Plexo Braquial/cirurgia , Articulação do Cotovelo/fisiologia , Eletromiografia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Dinamômetro de Força Muscular , Músculo Esquelético/inervação , Músculo Esquelético/cirurgia , Complicações Pós-Operatórias/fisiopatologia , Amplitude de Movimento Articular/fisiologia , Recuperação de Função Fisiológica/fisiologia , Estudos Retrospectivos , Resultado do Tratamento
15.
Int J Rheum Dis ; 22(9): 1714-1718, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31317675

RESUMO

BACKGROUND: The Patient-Rated Wrist Evaluation (PRWE) is a patient-reported questionnaire focusing on symptoms and function in wrist pathologies. It consists of 15 questions regarding pain and functional activities of the wrist. Rheumatoid arthritis (RA) is a multi-systemic disease characterized by inflammation of the wrist and hand joints in almost all patients. This study aims to test the validity of PRWE in patients with RA. METHOD: Seventy-five patients with RA from a single outpatient clinic participated in the study. Patients filled out the Michigan Hand Outcomes Questionnaire (MHOQ) and grip strength of both hands were measured. Patients filled out the PRWE questionnaire consecutively once for the dominant and once for the non-dominant hand. Correlations between PRWE and MHOQ and grip strength scores were analyzed by Spearman's correlation method. RESULTS: Our results demonstrated that there was a very strong correlation between the PRWE and the MHOQ and a moderate correlation between the PRWE and grip strength (P < .001). PRWE also showed negative and fair correlation with grip strength of both hands (P < .001). CONCLUSIONS: The Patient-Rated Wrist Evaluation is a valid tool for evaluating wrist involvement in patients with RA. PRWE may be preferred in the busy clinical setting since it has simple and short questions. Additionally, it may provide a sensitive follow-up tool for patients separately using its subscales of pain and function.


Assuntos
Artrite Reumatoide/diagnóstico , Avaliação da Deficiência , Medição da Dor , Inquéritos e Questionários , Articulação do Punho/fisiopatologia , Adulto , Idoso , Artrite Reumatoide/fisiopatologia , Fenômenos Biomecânicos , Feminino , Força da Mão , Humanos , Masculino , Pessoa de Meia-Idade , Dinamômetro de Força Muscular , Medidas de Resultados Relatados pelo Paciente , Valor Preditivo dos Testes , Amplitude de Movimento Articular , Reprodutibilidade dos Testes
16.
Int J Sports Med ; 40(9): 569-575, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31319428

RESUMO

We investigated the muscle activities of the infraspinatus and posterior deltoid, as well as the ratio of the infraspinatus to posterior deltoid muscle activities, in response to 3 resistance intensities during prone external rotation (PER) and sitting external rotation (SITER) exercises. Fifteen healthy males participated; the subjects performed two exercises randomly at three resistance intensity levels: 1) low intensity (10-20%); 2) medium intensity (45-55%); 3) high intensity (60-70%). Surface electromyography was used to measure the activities of the infraspinatus and posterior deltoid muscles. The activities of the infraspinatus and posterior deltoid increased significantly as the resistance intensity increased during both PER and SITER exercises (p<0.001). The infraspinatus-to-posterior deltoid activity ratio increased as the resistance intensity decreased. Whereas the muscle activity ratio was highest under low and medium intensity during PER and SITER, respectively, and the muscle activity ratio was significantly increased at medium intensity compared with high intensity during both PER (p=0.023) and SITER (p=0.001). Our results suggest that low to medium intensity is the appropriate resistance intensity for selective activation of the infraspinatus. In addition, our results suggest that PER and SITER are effective for strengthening the infraspinatus.


Assuntos
Músculo Deltoide/fisiologia , Exercício , Treinamento de Resistência/métodos , Manguito Rotador/fisiologia , Ombro/fisiologia , Adulto , Eletromiografia , Humanos , Masculino , Dinamômetro de Força Muscular , Rotação
17.
J Pak Med Assoc ; 69(7): 1000-1005, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31308571

RESUMO

OBJECTIVE: To estimate the test-retest reliability of measurements in shoulder internal and external rotators' isometric peak torque using a new dynamometer, and to compare it with isokinetic dynamometer. METHODS: The validity study was conducted in September-October 2016 at Pontificia Universidad Catolica de Chile and the Clinica Las Condes, Santiago, Chile. It comprised of asymptomatic university students who were randomly tested twice within a two-week period while in a supine position at 90° of shoulder abduction, using the novel functional electromechanical pulley dynamometer. Concurrent validity was assessed through comparing the values with the gold standard isokinetic dynamometer in the same position. SPSS 17 was used for data analysis. RESULTS: Of the 24 subjects, 5(21%) were males and 19(79%) were females. The overall mean age was 23.1±2.2 years, body mass index 23.6±2.13 kg/m2 and Shoulder Pain and Disability Index score was 3.9±6.4. There was no statistically non-significant difference in terms of test-retest trials and between the devices (p>0.05). Absolute reliability was 24.3% for internal rotation and 27.9% for external rotation. Both dynamometer systems were very highly correlated for internal rotators peak torque (0.93) and highly correlated for external rotators peak torque (0.84). CONCLUSIONS: Compared to the gold standard, the new device was found to be a valid instrument in measuring maximal voluntary isometric peak torque in internal and external rotation.


Assuntos
Contração Isométrica/fisiologia , Dinamômetro de Força Muscular , Força Muscular/fisiologia , Ombro/fisiologia , Torque , Adulto , Feminino , Humanos , Masculino , Reprodutibilidade dos Testes , Rotação , Adulto Jovem
18.
BMC Musculoskelet Disord ; 20(1): 320, 2019 Jul 08.
Artigo em Inglês | MEDLINE | ID: mdl-31286912

RESUMO

BACKGROUND: Muscle strength measurements using hand-held dynamometry (HHD) can be affected by the inadequate strength of the tester and lack of stabilization of the participants and the device. A portable HHD anchoring system was designed that enabled the measurement of isometric knee extensor muscle strength in a supine position. This can be used with individuals who are unable to assume the sitting position required for the measurement of knee extensor strength in conventional isokinetic dynamometry (IKD). The aim of this study was to evaluate the reliability and validity of knee extensor strength measurements using this device. METHODS: The maximal knee extensor isometric strength of the dominant leg in healthy adults aged 20 to 40 years was tested. Three trials of three contractions were assessed by two raters using the portable dynamometer anchoring system whilst the participant was in the supine position. After the three measurement trials, peak knee extensor torque was evaluated using IKD. The intraclass correlation coefficient (ICC) and 95% limits of agreement (LOA) for intra- and inter-rater reliability were obtained. RESULTS: Thirty-nine participants (19 male and 20 female, aged 30.08 ± 4.16 y), completed the three measurement trials. The ICC for intra-rater reliability was 0.98 for the maximum measurements of knee extensor strength (95% confidence interval [CI]: 0.96-0.98) and 0.98 (95% CI: 0.96-0.99) for inter-rater reliability. The mean difference (%) between the maximum knee extensor strength measurements of each trial was 1.02% (LOA range: - 11.13 to 13.16%) for intra-rater and - 1.44% (LOA range: - 13.98 to 11.08%) for inter-rater measurements. The Pearson correlation coefficient of the maximum voluntary peak torque measurements with the portable dynamometer anchoring system and IKD was 0.927. CONCLUSIONS: The portable dynamometer anchoring system is a reliable and valid tool for measuring isometric knee extensor strength in a supine position. Future clinical feasibility studies are needed to determine if this equipment can be applied to people with severe illness or disabilities. TRIAL REGISTRATION: KCT0003041 .


Assuntos
Articulação do Joelho/fisiologia , Dinamômetro de Força Muscular , Força Muscular/fisiologia , Músculo Esquelético/fisiologia , Adulto , Estudos Transversais , Feminino , Voluntários Saudáveis , Humanos , Contração Isométrica/fisiologia , Masculino , Reprodutibilidade dos Testes , Decúbito Dorsal/fisiologia , Adulto Jovem
19.
Phys Ther Sport ; 39: 32-37, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31229679

RESUMO

OBJECTIVE: To assess glenohumeral joint (GHJ) rotation strength across a rugby league season, since strength of rotator cuff musculature may protect against contact injuries to the shoulder. DESIGN: A prospective cohort study was used to compare GHJ rotation pre-, in-, and post-season. SETTING: Laboratory. PARTICIPANTS: Twenty-nine players from a professional European Super League club. MAIN OUTCOME MEASURES: Isokinetic dynamometry for concentric and eccentric muscle actions for shoulder internal and external rotation at 240°/s. Peak torque, traditional strength ratios, and dynamic control ratios were compared. RESULTS: There were no significant differences between peak torque strength parameters at any time point. Similarly, differences in strength ratios failed to reach statistical significance across the season. Ipsilateral strength ratios were indicative of selective strengthening of internal rotators for concentric and eccentric muscle actions. CONCLUSIONS: The findings suggest that rugby league players are no more likely to sustain a shoulder injury in the latter stages of the season as a result of decreased GHJ rotation strength. Players were able to maintain strength across the season which is valuable to practitioners developing conditioning programmes to optimise performance and minimise the risk of injury. This may afford protection, particularly during forced external rotation following physical contact.


Assuntos
Força Muscular/fisiologia , Estações do Ano , Articulação do Ombro/fisiologia , Adolescente , Adulto , Estudos de Coortes , Futebol Americano/fisiologia , Humanos , Masculino , Dinamômetro de Força Muscular , Rotação , Adulto Jovem
20.
J Electromyogr Kinesiol ; 48: 37-43, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31226630

RESUMO

Intermittent blood flow restriction to local or remote vascular beds induces endogenous protection against ischemia-reperfusion injury in several tissues and organs. When applied non-invasively by placing occlusion cuffs on the limbs, this ischemic conditioning has been shown to elicit an acute ergogenic response. However, the underlying mechanisms behind this phenomenon remain unknown. Prior research suggest that ischemic conditioning may operate via improved motor discharges from the central nervous system, thus enhancing the electrochemical activation and force generation of agonist muscles. Here we show that, for healthy individuals performing maximal voluntary contractions of the plantar flexors, the acute benefit elicited by ischemic conditioning on maximal isometric ankle torque production is largely explained by parallel gains in the surface myoelectrical activity of the triceps surae. However, the magnitude of this response appears to vary between individuals. These findings indicate that enhanced levels of agonist activity contribute to the ergogenic effect of ischemic conditioning during maximal efforts, thereby enabling more direct assessments of neural output following the procedure.


Assuntos
Articulação do Tornozelo/fisiologia , Pé/fisiologia , Precondicionamento Isquêmico , Contração Isométrica , Músculo Esquelético/fisiologia , Adulto , Tornozelo/fisiologia , Estudos Cross-Over , Eletromiografia , Humanos , Masculino , Dinamômetro de Força Muscular , Processamento de Sinais Assistido por Computador , Estresse Mecânico , Torque
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