Serious adverse events were rare , and no serious events were reported to be directly related to the exercise programme .
This review provides evidence that PRT is an effective intervention for improving physical functioning in  older people , including improving strength and the performance of some simple and complex activities .
BACKGROUND Muscle weakness in old age is associated with physical function decline .
Progressive resistance strength training ( PRT ) exercises are design ed to increase strength .
OBJECTIVES To assess the effects of PRT on older people and identify adverse events .
Treating disability in knee osteoarthritis with exercise therapy: a central role for self-efficacy and pain.
OBJECTIVE To examine the effects of aerobic and resistance exercise on self-efficacy beliefs in older adults with knee osteoarthritis ( OA ) and to determine whether self-efficacy and knee pain mediated the effects of the treatments on stair time performance and health perceptions . METHODS Measures of self-efficacy , knee pain , stair climbing performance , and health perceptions were collected prior to r and omization and again at an 18-month followup in older adults with knee OA who were assigned to 1 of 3 treatment conditions : aerobic exercise , resistance training , or health education control .  All analyses were conducted on the intention-to-treat principle . RESULTS Both exercise treatments increased self-efficacy for stair climbing in comparison to the health education control group . Both knee pain and self-efficacy mediated the effect of the treatments on stair climb time , whereas only knee pain mediated health perceptions . CONCLUSIONS The findings suggest that control beliefs and changes in physical symptoms such as knee pain are important outcomes in physical activity programs with patients who have OA of the knee . Moreover , these variables mediate the effects that such programs have on disability and health perceptions
Serious adverse events were rare , and no serious events were reported to be directly related to the exercise programme .
This review provides evidence that PRT is an effective intervention for improving physical functioning in  older people , including improving strength and the performance of some simple and complex activities .
BACKGROUND Muscle weakness in old age is associated with physical function decline .
Progressive resistance strength training ( PRT ) exercises are design ed to increase strength .
OBJECTIVES To assess the effects of PRT on older people and identify adverse events .