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 .
Effect of aerobic and resistance training on fractionated reaction time and speed of movement.
To evaluate the effect of aerobic and variable resistance exercise training on fractionated reaction time ( RT ) and speed of movement ( SM ) in elderly individuals , premotor time ( PMT ) , motor time ( MT ) , total RT , and SM were measured in 49 healthy , untrained men and women , 70 to 79 years of age , before and after 6 months of training . Subjects were r and omized into either a walk/jog ( n = 17 ) , a strength training ( n = 20 ) , or a control group ( n = 12 ) . Improvements in aerobic capacity were only weakly related to reduced total RT ( r = 0.30 , p less than .05 ) . Analysis of covariance revealed that there were no differences ( p greater than .05 ) among the three groups after training with respect to PMT , MT , total RT , and SM . These findings indicate that 6 months of aerobic and strength training did not induce significant changes in RT or SM in this group
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 .