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 .
Home program of physical therapy: effect on disabilities of patients with total hip arthroplasty.
OBJECTIVE To study the effect of a home program of physical therapy . DESIGN Nonr and omized control trial . SETTING Home based . PATIENTS Subjects had total hip arthroplasty ( THA ) for hip osteoarthritis ( hip-OA ) without THA failure , or cardiopulmonary , neurological , or cognitive problems . Twenty-three subjects ( mean age 63.4 years ; mean post-THA period 793 days , 6 to 48 months ) were divided into 3 groups matching with age , gender , and postoperative periods . INTERVENTION The 6-week home program included range of motion ( ROM ) exercises , and low resistance isometric and eccentric exercises of hip abductors . Physical therapists prescribed ROM and isometric exercises for group A , all programs for group B , and no programs for the control group . The programs were modified every 2 weeks as necessary . MAIN OUTCOME MEASURE Hip ROM , maximum isometric hip abduction torque measured by Cybex II , gait speed , and cadence were evaluated . RESULTS The practice ratio of the program was about 70 % for both groups . Maximum isometric torque improved in the THA side of group A ( p < .01 ) and the control group ( p < .05 ) , and on both sides in group B ( p < .01 ) . Gait speed and cadence also improved significantly . No correlation coefficient existed between practice days and the improvement ratio of the maximum torque . CONCLUSION The home program was effective in long-term post-THA
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 .