PRT results in improvements to muscle strength and some aspects of functional limitation , such as gait speed , in older adults .
However , based on current data , the effect of PRT on physical disability remains unclear .
Further , due to the poor reporting of adverse events in trials , it is difficult to evaluate the risks associated with PRT
BACKGROUND The aim of this systematic review was to quantify the effectiveness of progressive resistance strength training ( PRT ) to reduce  physical disability in older people .
Strength and Aging: An Exploratory Study
Strength measurements were administered to 52 men ranging in age from 42 to 83 years , who were then r and omly assigned within their respective age group to either the  Isometric-training Group ( ITG ) or to the  Control-exercise Group ( CEG )  . At the conclusion of a six-week training program all initial measurements were again administered . No significant differences were found in ( 1 ) strength trainability by age group , and ( 2 ) in strength trainability by muscle group when the upper-extremity-strength ratios were compared with the lower-extremity-strength ratios . When the initial and final strength scores of the ITG were subjected to a t test for correlated sample s , the findings included : ( 1 ) the four age groups of the ITG experienced statistically significant gains in strength for six of the eight strength measurements , and ( 2 ) as age increased , strength trainability appeared to decrease
PRT results in improvements to muscle strength and some aspects of functional limitation , such as gait speed , in older adults .
However , based on current data , the effect of PRT on physical disability remains unclear .
Further , due to the poor reporting of adverse events in trials , it is difficult to evaluate the risks associated with PRT
BACKGROUND The aim of this systematic review was to quantify the effectiveness of progressive resistance strength training ( PRT ) to reduce  physical disability in older people .