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 .
Effect of protein source on resistive-training-induced changes in body composition and muscle size in older men.
BACKGROUND Aging is associated with reductions in muscle mass and strength , but nutrition and exercise interventions can delay this progression and enhance the quality of life . OBJECTIVE We examined whether the predominant source of protein consumed by older men influenced measures of muscle size and strength , body composition , resting energy expenditure , and skeletal muscle creatine concentrations in response to 12 wk of resistive training . DESIGN After consuming a lactoovovegetarian ( LOV ) diet for 2 wk , 21 men aged 65 + /- 5 y were r and omly assigned to either consume a beef-containing ( BC ) diet ( n = 10 ) or to continue the LOV diet ( n = 11 ) throughout resistive training . The BC diet included 0.6 g protein . kg(-1 ) . d(-1 ) from beef and the LOV diet included 0.6 g protein . kg(-1 ) . d(-1 ) from textured vegetable protein ( soy ) sources . The remaining protein in the diets came from self-selected LOV sources . RESULTS The mean total protein intake for both groups ranged from 1.03 to 1.17 g. kg(-1 ) . d(-1 ) during the intervention . Men in both groups had improvements ( 14 - 38 % ) in maximal dynamic strength of all the muscle groups trained with no significant difference between groups . With resistive training , cross-sectional muscle area of the vastus lateralis increased in both groups ( 4.2 + /- 3.0 % and 6.0 + /- 2.6 % for the LOV and BC groups , respectively ) with no significant difference between groups . Body composition , resting energy expenditure , and concentrations of muscle creatine , phosphocreatine , and total creatine did not differ significantly between groups or change over time . CONCLUSIONS These data suggest that increases in muscle strength and size were not influenced by the predominant source of protein consumed by older men with adequate total protein intake
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 .