PRT had a large positive effect on strength ( 41 trials , 1955 participants ) , but there was statistical heterogeneity that was not explained by differences in study quality , participant characteristics or the exercise program .
REVIEW ER 'S CONCLUSIONS PRT appears to be an effective intervention to increase strength in older people and has a positive effect on some functional limitations .
However , the effect of this intervention on more substantive outcomes such as measures of disability or HRQOL remains unclear .
BACKGROUND Muscle weakness in old age , is associated with physical disability and an increased risk of falls .
Progressive resistance strength ( PRT ) training exercises ( i.e. movements performed against a specific external force that is regularly increased during training ) are design ed to increase strength in older people .
OBJECTIVES To assess the effect of PRT on measures of physical disability , functional limitation and impairment in older people  , and identify adverse events .
Cardiovascular responses of 70- to 79-yr-old men and women to exercise training.
This study determined the effects of endurance or resistance exercise training on maximal O2 consumption ( VO2max ) and the cardiovascular responses to exercise of 70- to 79-yr-old men and women . Healthy untrained subjects were r and omly assigned to a control group ( n = 12 ) or to an endurance ( n = 16 ) or resistance training group ( n = 19 ) . Training consisted of three sessions per week for 26 wk . Resistance training consisted of one set of 8 - 12 repetitions on 10 Nautilus machines . Endurance training consisted of 40 min at 50 - 70 % VO2max and at 75 - 85 % VO2max for the first and last 13 wk of training , respectively . The endurance training group increased its VO2max by 16 % during the first 13 wk of training and by a total of 22 % after 26 wk of training ; this group also increased its maximal O2 pulse , systolic blood pressure , and ventilation , and decreased its heart rate and perceived exertion during submaximal exercise . The resistance training group did not elicit significant changes in VO2max or in other maximal or submaximal cardiovascular responses despite eliciting 9 and 18 % increases in lower and upper body strength , respectively . Thus healthy men and women in their 70s can respond to prolonged endurance exercise training with adaptations similar to those of younger individuals . Resistance training in older individuals has no effect on cardiovascular responses to submaximal or maximal treadmill exercise
PRT had a large positive effect on strength ( 41 trials , 1955 participants ) , but there was statistical heterogeneity that was not explained by differences in study quality , participant characteristics or the exercise program .
REVIEW ER 'S CONCLUSIONS PRT appears to be an effective intervention to increase strength in older people and has a positive effect on some functional limitations .
However , the effect of this intervention on more substantive outcomes such as measures of disability or HRQOL remains unclear .
BACKGROUND Muscle weakness in old age , is associated with physical disability and an increased risk of falls .
Progressive resistance strength ( PRT ) training exercises ( i.e. movements performed against a specific external force that is regularly increased during training ) are design ed to increase strength in older people .
OBJECTIVES To assess the effect of PRT on measures of physical disability , functional limitation and impairment in older people  , and identify adverse events .