Sarcopenia, mobilidade funcional e nível de atividade física em idosos ativos da comunidade.

• Ano de defesa: 2008
• Autor(a) principal: Patricia Azevedo Garcia
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Limitação da mobilidade; Idoso; Força da mão; Força muscular; Marcha; Idosos; Envelhecimento Aspectos fisiologicos; Medicina de reabilitação
• Link de acesso: http://hdl.handle.net/1843/MSMR-7W7GPN

sarcopenia is one of the most significant physiological changes related to aging and seems to be the main cause of functional mobility loss in the elderly. The objectives of this research were to explore lower extremity muscle strength and power, calf circumference (CC), handgrip strength (HG), functional mobility and level of physical activity among age groups of active older people (men and women) and to identify the best parameter for screening the muscle function loss in elderly. Materials and Methods: 81 community-dwelling elderly (42 women and 39 men) participated. Walking speed (Multisprint Kit), HG (dynamometer Jamar), muscle function of hip, knee and ankle (isokinetic dynamometer Biodex System 3 Pro), level of physical activity (Human Activity Profile) and CC (tape measure) were evaluated. Variance analysis, Pearsonss correlation and ROC curves were used for statistical analysis. Statistical significance was accepted if the two-tailed P value was < 0.05. Results: elderly over the age of 80 showed lower values than the 65-69 age group for right CC (34.93 vs 37.73.6), habitual (1.10.2 vs 1.20.2) and fast (1.40.3 vs 1.70.3) walking speed, HG (23.87.5 vs 31.810.3), average peak torque and average power of hip, knee and ankle (p<0.05). The level of physical activity did not show differences among age groups. The majority of the differences of averages of the 70-79 age group was not significant. In analysis of correlations, muscle function parameters showed moderate significant correlations with walking speed and HG, and fair degree of relationship with CC and level of physical activity (p<0.05). The ROC curve analysis suggested a cutpoint of 14.51 Kgf for screening muscle function loss in elderly women. Conclusion: This study showed an association between muscle function, HG and fast walking speed as well as the decreasing of these parameters with aging and suggested a possible screening of reduction of muscle function of lower extremities through HG. These results indicated that muscle strength and power optimization are needed on prevention and rehabilitation programs to maintain functional mobility in community-dwelling elderly. In addition, more research is necessary to introduce hand grip performance on routine assessment.