Redução da força muscular está relacionada à perda muscular em mulheres acima de 40 anos
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Data
2011-02-01
Autores
Orsatti, Fábio Lera [UNESP]
Dalanesi, Reinaldo Cesar [UNESP]
Maestá, Nailza [UNESP]
Nahás, Eliana Aguiar Petri [UNESP]
Burini, Roberto Carlos [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Santa Catarina
Resumo
O objetivo do estudo foi comparar a influência da idade na massa muscular e na força muscular, de membros superiores e inferiores, em mulheres acima de 40 anos. Foram estudadas 52 voluntárias, divididas em 3 grupos etários: 40-49 anos(G40, n=16), 50-59 anos(G50, n=18) e 60-70 anos(G60, n=18). Avaliaram-se: massa muscular (MM) por impedância bioelétrica e força muscular-1RM (FM). Para estatística, utilizaram-se análise variância-one-way, teste de Duncan e correlação de Pearson. Observou-se diferença significativa (p<0,05) entre 10,1% na MM entre G40 e G50 e 7,5% entre G50 e G60, totalizando 16,8% nas duas décadas (G40/G60). A FM de membros inferiores foi 16,4% menor entre G40 e G50 e 12,5% entre G50 e G60, perfazendo 25,3% nas duas décadas (p<0,05). Nos membros superiores, não houve diferença significativa da força, entre G40 e G50 (3,3% supino reto e 2,5% rosca direta) e entre G50 e G60 (17,5% e 9,6%), totalizando, nas duas décadas, 20,2% e 12,2%, respectivamente. A Soma das FMs foi corrigida pela MM (FMs/MM), não apresentando diferenças estatísticas entre os grupos. Correlacionando-se MM e FM, houve maior analogia nos membros inferiores (r=0,57), quando comparados aos membros superiores (r=0,42 e r=41, respectivamente). Concluíu-se que as mulheres apresentaram menores valores de MM e de FM nos membros inferiores logo na quinta década de vida. A FMs/MM parece não se alterar em mulheres entre 40 e 60 anos, quando comparadas por grupos etários. A MM reduzida parece ser fator importante para os menores valores de FM observados em mulheres entre 40 e 60 anos.
The objective of this study was to compare the influence of age on muscle mass (MM) and muscle strength (MS) of the upper and lower limbs in women older than 40 years. Fifty-two volunteers were divided into three age groups: 40-49 years (G40, n = 16), 50-59 years (G50, n = 18), and 60-70 years (G60, n = 18). MM was evaluated by bioelectrical impedance and MS by the 1RM test. One-way analysis of variance, Duncan's test and Pearson's correlation coefficient were used for statistical analysis. There was a significant difference in MM (p < 0.05) of 10.1% between G40 and G50 and of 7.5% between G50 and G60, corresponding to 16.8% in the two decades (G40/G60). Lower limb MS was 16.4% lower between G40 and G50 and 12.5% between G50 and G60, corresponding to 25.3% in the two decades (p < 0.05). In the upper limbs, there was no significant difference in MS between G40 and G50 (3.3% and 2.5% bench curl) or between G50 and G60 (17.5% and 9.6%), corresponding to 20.2% and 12.2% in the two decades, respectively. The sum of MS was corrected by MM (MS/MM) and no significant differences were observed between groups. Comparison of MM and MS showed a closer correlation in the lower limbs (r = 0.57) when compared to the upper limbs (r = 0.42 and r = 0.41, respectively). In conclusion, women presented lower MM and MS in the lower limbs as early as in the fifth decade of life. MS/MM does not change in women between 40 and 60 years when compared according to age group. Reduced MM seems to be an important for the lower MS observed in women between 40 and 60 years of age.
The objective of this study was to compare the influence of age on muscle mass (MM) and muscle strength (MS) of the upper and lower limbs in women older than 40 years. Fifty-two volunteers were divided into three age groups: 40-49 years (G40, n = 16), 50-59 years (G50, n = 18), and 60-70 years (G60, n = 18). MM was evaluated by bioelectrical impedance and MS by the 1RM test. One-way analysis of variance, Duncan's test and Pearson's correlation coefficient were used for statistical analysis. There was a significant difference in MM (p < 0.05) of 10.1% between G40 and G50 and of 7.5% between G50 and G60, corresponding to 16.8% in the two decades (G40/G60). Lower limb MS was 16.4% lower between G40 and G50 and 12.5% between G50 and G60, corresponding to 25.3% in the two decades (p < 0.05). In the upper limbs, there was no significant difference in MS between G40 and G50 (3.3% and 2.5% bench curl) or between G50 and G60 (17.5% and 9.6%), corresponding to 20.2% and 12.2% in the two decades, respectively. The sum of MS was corrected by MM (MS/MM) and no significant differences were observed between groups. Comparison of MM and MS showed a closer correlation in the lower limbs (r = 0.57) when compared to the upper limbs (r = 0.42 and r = 0.41, respectively). In conclusion, women presented lower MM and MS in the lower limbs as early as in the fifth decade of life. MS/MM does not change in women between 40 and 60 years when compared according to age group. Reduced MM seems to be an important for the lower MS observed in women between 40 and 60 years of age.
Descrição
Palavras-chave
Sarcopenia, Envelhecimento, Mulheres, Sarcopenia, Aging, Women
Como citar
Revista Brasileira de Cineantropometria & Desempenho Humano. Universidade Federal de Santa Catarina, v. 13, n. 1, p. 36-42, 2011.