The study compared 12 weeks of explosive high-speed power training with traditional slow-speed strength training. Outcome measures included muscle performance: leg press (LP) and knee extension (KE) one-repetition maximum (1RM) and LP peak power (PP), velocity at peak power (PPV) and force at peak power (PPF) from 40%-90% of the 1RM. Measures of function consisted of habitual and maximal gait velocity, the short physical performance battery (SPPB), forward tandem walk, and lower limb movement time (braking speed) on an automobile driving simulator.