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 .
What is a Clinically Meaningful Improvement in Leg-Extensor Power for Mobility-limited Older Adults?
BACKGROUND Muscle power is a key predictor of physical function in older adults ; however , clinical ly meaningful improvements in leg-extensor muscle power have yet to be identified . The purpose of this study is to establish the minimal clinical ly important improvement ( MCII ) and substantial improvement ( SI ) for leg-extensor power and muscle contraction velocity in mobility-limited older adults . METHODS Data were extracted from three r and omized trials of leg-extensor muscle power training interventions ( 3- to 6-month duration ) .  Measurements of leg-extensor power and velocity were obtained using dynamic bilateral leg press at 40 % and 70 % of the one-repetition maximum . Anchor-based MCIIs were calculated using selected items extracted from the Late Life Function and Disability Instrument . St and ard error of measurement and effect size methods were used to calculate the distribution-based MCII . RESULTS Data from 164 participants ( mean age : 76.6 ± 5.6 years ; Short Physical Performance Battery score : 7.8 ± 1.3 ) were used in this analysis . The respective MCII and SI estimates for 40 % leg-extensor power were 18.3 ( 9 % ) and 30.5 ( 15 % ) W , and 23.1 ( 10 % ) and 41.6 ( 18 % ) W for 70 % leg-extensor power . The respective MCII and SI estimates for 40 % average velocity were 0.03(7 % ) and 0.08(18 % ) m/s , and 0.02(6 % ) and 0.05(15 % ) m/s for 70 % average velocity . CONCLUSIONS This is the first study to establish a clinical ly meaningful improvement of leg-extensor power ( 9%-10 % ) and velocity ( 6%-7 % ) in mobility-limited older adults . These findings should be used to aid in the design and interpretation of clinical trials and interventions that target improvements in muscle power in this high-risk population
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 .