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 .
The effect of a 12-week dynamic resistance strength training program on gait velocity and balance of older adults.
This study tested whether a 12-week dynamic resistance strength training program can change gait velocity and improve measures of balance among adults age 65 and older . Fifty-five community-dwelling adults ( mean age = 71.1 ) were r and omized into an exercise ( n = 25 ) or control ( n = 30 ) group . The exercisers were requested to complete three bouts of strength training per week for 12 weeks using elastic tubing . At posttest the exercisers demonstrated slower gait velocity , enhanced balance , and an improved ability to walk backward , although none of these posttest measures was significantly different from the control group
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 .