Before revision: Power walking or speed walking is the act of walking with a speed at the upper end of the natural range for the walking gait, typically 7 to 9 km/h ( 4.5 to 5.5 mph).
After revision: Power walking or speed walking is the act of walking with a speed at the upper end of the natural range for the walking gait, typically 7 to 9 km/h ( 4.3 to 5.5 mph).