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 .
Effects of resistance training on selected indexes of immune function in elderly women.
Women aged 67 - 84 yr were r and omly assigned to either resistance exercise ( RE , n = 15 ) or control group ( C , n = 14 ) . RE group completed 10 wk of resistance training , whereas C group maintained normal activity . Blood sample s were obtained from the RE group ( at the same time points as for resting C ) at rest , immediately after resistance exercise , and 2 h after exercise before ( week 0 ) and after ( week 10 ) training . Mononuclear cell ( CD3 + , CD3+CD4 + , CD3+CD8 + , CD19 + , and CD3-CD16+CD56 + ) number , lymphocyte proliferative ( LP ) response to mitogen , natural cell-mediated cytotoxicity ( NCMC ) , and serum cortisol levels were determined . Strength increased significantly in RE subjects ( % change 8-repetition maximum = 148 % ) . No significant group , exercise time , or training effects were found for CD3 + , CD3+CD4 + , or CD3+CD8 + cells , but there was a significant exercise time effect for CD3-CD16+CD56 + cells . LP response was not different between groups , across exercise time , or after training . NCMC was increased immediately after exercise for RE subjects at week 0 and for RE and C groups at week 10 . The week 0 and week 10 NCMC values were above baseline for both RE and C groups 2 h after exercise . In conclusion , acute resistance exercise did not result in postexercise suppression of NCMC or LP , and 10 wk of resistance training did not influence resting immune measures in women aged 67 - 84 yr
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 .