Finally , muscle power testing was found to be safe in older people with a broad range of health and functional states
Background Muscle power has been proposed to be the primary therapeutic target for resistance training interventions aim ed at enhancing physical function in older adults .
However , no recommendations exist on ideal testing protocol s to assess muscle power in older adults , and the safety of this procedure has not been adequately evaluated in the literature .
Methods A systematic review was conducted to identify studies evaluating muscle power exerted by older people in resistance exercises through May 2017 .
Effects of Testosterone Supplementation for 3 Years on Muscle Performance and Physical Function in Older Men
Context : Findings of studies of testosterone ’s effects on muscle strength and physical function  in older men have been inconsistent ; its effects on muscle power and fatigability have not been studied . Objective : To determine the effects of testosterone administration for 3 years in older men on  muscle strength , power , fatigability , and physical function . Design , Setting , and Participants : This was a double-blind , placebo-controlled , r and omized trial of healthy men ≥60 years old with total testosterone levels of 100 to 400 ng/dL or free testosterone levels < 50 pg/mL. Interventions : R and om assignment to 7.5 g of 1 % testosterone or placebo gel daily for 3 years . Outcome Measures : Loaded and unloaded stair-climbing power , muscle strength , power , and fatigability in leg press and chest press exercises , and lean mass at baseline , 6 , 18 , and 36 months . Results : The groups were similar at baseline . Testosterone administration for 3 years was associated with significantly greater performance in unloaded and loaded stair-climbing power  than placebo ( mean estimated between-group difference , 10.7 W [ 95 % confidence interval ( CI ) , −4.0 to 25.5 ] , P = 0.026 ; and 22.4 W [ 95 % CI , 4.6 to 40.3 ] , P = 0.027 ) , respectively . Changes in chest-press strength ( estimated mean difference , 16.3 N ; 95 % CI , 5.5 to 27.1 ; P < 0.001 ) and power ( mean difference 22.5 W ; 95 % CI , 7.5 to 37.5 ; P < 0.001 ) , and leg-press power were significantly greater in men r and omized to testosterone than in those r and omized to  placebo . Lean body mass significantly increased more in the testosterone group . Conclusion : Compared with placebo , testosterone replacement in older men for 3 years was associated with modest but significantly greater improvements in stair-climbing power , muscle mass , and power . Clinical meaningfulness of these treatment effects and their impact on disability in older adults with functional limitations remains to be studied
Finally , muscle power testing was found to be safe in older people with a broad range of health and functional states
Background Muscle power has been proposed to be the primary therapeutic target for resistance training interventions aim ed at enhancing physical function in older adults .
However , no recommendations exist on ideal testing protocol s to assess muscle power in older adults , and the safety of this procedure has not been adequately evaluated in the literature .
Methods A systematic review was conducted to identify studies evaluating muscle power exerted by older people in resistance exercises through May 2017 .