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 .
The effects of improved strength on obstacle negotiation in community-living older adults.
Poor mobility has been associated with age-related deterioration in muscle strength . While previous work has examined the effects of improved strength on level walking , we have quantified the effects of a resistance-training program on obstructed gait tasks using biomechanical-dependent measures . Forty-five community-dwelling participants aged 62 years or older were r and omised to either a control ( n=16 ) or experimental group ( n=29 ) . The experimental subjects exercised for 24 weeks on a progressive resistance-training program design ed to improve lower body strength . Dynamic strength was assessed at weeks 0 and 24 as well as specific laboratory gait kinetics and kinematics during stepping over an obstacle and negotiation of a raised surface set at 10 , 20 and 30 % of each subject 's leg length . Significant strength improvements ( P<0.05 ) , ranging between 197 and 285 % , were recorded in the experimental group . The strength gains in the experimental group were accompanied by significant increases in obstacle-crossing stride velocity ( range 5.5 - 15.5 % ) due to increases in stride length and decreases in stride duration for both gait tasks . Significant changes in the peak vertical and anterior-posterior ground reaction forces as well as in kinematic variables associated with a safe obstacle traverse such as vertical obstacle heel clearance , limb flexion at obstacle crossing , horizontal foot placement and vertical l and ing velocity result ed in an improved crossing strategy in the experimental subjects . These findings provide evidence of significant improvements in obstructed gait function of community-living older adults associated with a systematic resistance-training program
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 .