power training is feasible for elderly persons and has a small advantage over strength training for functional outcomes .
OBJECTIVE to determine the effects of power training with high movement velocity compared with conventional resistance training with low movement velocity for older community-dwelling people .
Increased velocity exercise specific to task training versus the National Institute on Aging's strength training program: changes in limb power and mobility.
BACKGROUND This study was design ed to evaluate the benefits of InVEST ( Increased Velocity Specific to Task ) training on limb power and mobility among mobility-limited older adults . METHODS We conducted a single blinded , r and omized controlled trial among 138 mobility-limited community-dwelling older adults , evaluating two 16-week supervised exercise programs . The intervention group participated in InVEST training , and the control group participated in the National Institute on Aging 's ( NIA ) strength training program . Primary outcomes were changes in limb power per kilogram and mobility performance as measured by the Short Physical Performance Battery ( SPPB ) . RESULTS After 16 weeks , InVEST produced significantly greater improvements in limb power than NIA ( p=.02 ) . There was no significant difference in strength improvements . Both groups had significant changes in SPPB of greater than 1 unit . Self-reported function was also significantly improved in both groups . Differences between groups were not statistically different . In a post hoc analysis when participants were categorized by the manifestation of baseline leg velocity impairments ( N=68 ) , InVEST training produced effect size differences in SPPB that were clinical ly meaningful ( SPPB Group x Time difference 0.73 units , p=.05 ) . CONCLUSIONS Among mobility-limited older adults , both NIA and InVEST produce robust changes in observed physical performance and self-reported function . These improvements were not meaningfully different by statistical or clinical criteria . Compared with NIA , InVEST training produced greater improvements in limb power and equivalent improvements in strength . Observed differences between NIA and InVEST based upon baseline leg impairment status are informative for futures studies
power training is feasible for elderly persons and has a small advantage over strength training for functional outcomes .
OBJECTIVE to determine the effects of power training with high movement velocity compared with conventional resistance training with low movement velocity for older community-dwelling people .