1
Stand upright on an unstable surface (BOSU ball, balance ball, or flat ground) with feet hip-width apart, core engaged, and hands in a relaxed running position
2
Adopt a high-knee running form with slight forward trunk lean. Drive one knee up toward chest level while maintaining balance on the supporting leg, then alternate legs in a running motion
3
Control the lowering phase by allowing the driving leg to extend back down in a controlled manner while maintaining upright posture and core stability throughout the movement
4
Explosively drive the opposite knee upward to chest height while maintaining balance, alternating legs in a continuous running pattern. Keep arms swinging naturally at sides in running cadence