Cadence ( F3 ,153 = 5.81 , P = 0.012 ) , stride length ( F3 ,179 = 20.01 , P < 0.001 ) , walking speed ( F3 ,167 = 18.2 , P < 0.001 ) , anterior-posterior ground reaction force ( F3 ,164 = 6.61 , P = 0.004 ) , peak hip power in preswing ( F3 ,156 = 8.76 , P < 0.001 ) , and peak ankle power at push-off ( F3 ,149 = 6.38 , P = 0.005 ) all improved with respect to time .