Conclusions This review provides evidence that RT has a moderate positive effect on self-reported disability/function  in old people with or at risk for disability .
The effects are strongly associated with effects on objective measures of lower body functional capacity
Background Self-reported disability has a strong negative impact on older people ’s  quality of life and is often associated with the need for assistance and health care services .
Resistance training ( RT ) has been repeatedly shown to improve muscle function ( e.g. strength ) and functional capacity ( e.g. gait speed , chair-rise ) in older adults with functional limitations .
Nevertheless , it is unclear whether such objective ly assessed improvements translate into a reduction in self-reported disability .
Objectives To assess : i ) whether and to what extent RT interventions have an effect on self-reported disability in older adults ( ≥65 years ) with functional limitations or disability ; and ii ) whether the effects on self-reported disability are associated with changes in objective measures of muscle strength and functional capacity across studies .
INVITED COMMENTARY: Rating the Quality of Trials in Systematic Reviews of Physical Therapy Interventions
& NA ; Physical therapists seeking to use evidence to guide their practice may have limited time to read research reports . One way to reduce the time required to identify and read about the research that is relevant to a particular clinical question is to read a systematic review that summarizes multiple studies . This paper explains the process that is used to conduct systematic review s , which includes the establishment of a protocol , comprehensive search ing , appraisal of the quality of the included studies , data extraction and meta analysis , and consideration of the clinical and research implication s of the findings . We also consider how the reader of a systematic review can determine whether the review is likely to provide an unbiased ( believable ) estimate of the treatment effect . A systematic review of r and omized trials of a  cardiopulmonary physical therapy intervention is used as an example . The issue of appraisal of quality is then discussed further , with a demonstration of how one vali date d tool for quality appraisal ‐‐the PEDro scale‐‐can be used to evaluate a r and omized trial in cardiopulmonary physical therapy
Conclusions This review provides evidence that RT has a moderate positive effect on self-reported disability/function  in old people with or at risk for disability .
The effects are strongly associated with effects on objective measures of lower body functional capacity
Background Self-reported disability has a strong negative impact on older people ’s  quality of life and is often associated with the need for assistance and health care services .
Resistance training ( RT ) has been repeatedly shown to improve muscle function ( e.g. strength ) and functional capacity ( e.g. gait speed , chair-rise ) in older adults with functional limitations .
Nevertheless , it is unclear whether such objective ly assessed improvements translate into a reduction in self-reported disability .
Objectives To assess : i ) whether and to what extent RT interventions have an effect on self-reported disability in older adults ( ≥65 years ) with functional limitations or disability ; and ii ) whether the effects on self-reported disability are associated with changes in objective measures of muscle strength and functional capacity across studies .