摘要：Smolarek AC, McAnulty SR, Schoenfeld BJ, Cordeiro CW,Honorato IC, Ferreira LH, Mascarenhas LP, Souza WC,Oliveira CS, Laat EF, Utter AC, Souza-Junior TP. StrengthDecline in Sedentary Males and Females of Different Ages.JEPonline 2018;21(2):40-50. The purpose of this study wasto compare the muscle strength of sedentary adults withindifferent age groups and investigate the effect of age onchanges in strength and body composition. Six hundred andtwenty-seven sedentary subjects were recruited (331 malesand 296 females) and stratified into three age groups of 20 to29 yrs (G1), 30 to 39 yrs (G2), and 40 to 49 yrs (G3). Allsubjects were not physically active. Subjects’ anthropometricmeasurements were taken prior to a 1-min sit-up test that wasfollowed by an arm flexion and extension exercise. Forfemales, their body mass decreased by 6.1% (P=0.01) when comparing G1 with G3. For the 1-min sit-up test, there was a decrease of 27.7% and 53.3%(P=0.001 and P=0.001, respectively) when comparing G1 with G2 and G3, respectively. Also,G2 compared to G3 exhibited a decrease of 20% (P=0.001). Regarding males, there was adecrease in the 1-min sit-up test of 26.8% (P=0.001) when comparing G1 with G3 and adecrease of 23.1% (P=0.001) when comparing G2 with G3. But in the flexion and extensionof the arms, a decrease in strength did not exist for either sex (P>0.05). The findings indicatethat while an increase in sedentary adults stratified by age is associated with a significantincrease in BM and BF in males and females, a significant increase in BMI in the males withno significant difference in females, a significant decrease in LM in females with no significantdifference in males, a significant decrease in the 1-min sit-up test in males and females, therewere no significant differences observed in the push-up test (EFE) in males and females.
