PRT results in improvements to muscle strength and some aspects of functional limitation , such as gait speed , in older adults .
However , based on current data , the effect of PRT on physical disability remains unclear .
Further , due to the poor reporting of adverse events in trials , it is difficult to evaluate the risks associated with PRT
BACKGROUND The aim of this systematic review was to quantify the effectiveness of progressive resistance strength training ( PRT ) to reduce  physical disability in older people .
A 10-week strength training program: effect on the motor performance of an unimpaired upper extremity.
OBJECTIVE Muscle strength training is one of the most common therapy methods in physical therapy programs , and the usual goal of this treatment is to improve muscle strength . Little attention has been paid , however , to the effects of strength training on the other components of motor performance . This study examined the effects of a 10-week strength training program on the motor performance of the h and , including reaction time , speed of movement , tapping speed , and coordination in normal healthy volunteers . DESIGN Before-after trial . SUBJECTS AND SETTING Sixteen healthy women volunteers aged 25 to 45 years participated . INTERVENTION Subjects accomplished a 10-week muscle strength training program of the upper extremities . MAIN OUTCOME MEASURES Reaction time , speed of movement , tapping speed , and coordination were measured three times on consecutive days , and muscle strength and electromyographic values of the right upper extremity were recorded once before the training period . After the training period , the same measurements were made as before the training . RESULTS The 10-week strength training decreased choice reaction time by 6 % ( p < .01 ) and increased tapping speed by 3 % ( p < .01 ) and coordination by 5 % ( p < .05 ) . Speed of movement increased , but this change was not statistically significant . All the measured isometric muscle strengths and electromyographic activations upon maximum isometric contraction increased . CONCLUSIONS A 10-week strength training of the upper extremities increased muscle strength and some motor performance functions of the h and , including choice reaction time , tapping speed , and coordination
PRT results in improvements to muscle strength and some aspects of functional limitation , such as gait speed , in older adults .
However , based on current data , the effect of PRT on physical disability remains unclear .
Further , due to the poor reporting of adverse events in trials , it is difficult to evaluate the risks associated with PRT
BACKGROUND The aim of this systematic review was to quantify the effectiveness of progressive resistance strength training ( PRT ) to reduce  physical disability in older people .