Hip Muscle Power, Lateral Balance Function, and Falls in Aging

Falls and their consequences are among the major problems in the medical care of older individuals. The long-term goal of this research is to develop a mechanistically based therapeutic intervention to enhance muscle power, weight-shifting capability, and lateral balance function through protective stepping to prevent falls. When human balance is challenged, protective stepping is a vital strategy for preventing a fall during activities of daily life. Many older people at risk for falls have particular difficulties with successfully stepping sideways as a protective response to loss of balance in the lateral direction. Age-related declines in lateral balance function result from neuromuscular and biomechanical limitations in hip abductor-adductor muscle power generation. This study will test whether these impairments can be improved with high-velocity hip muscle resistance power training that will be more effective than conventional resistance strength training.