Abstract Summary
This study aimed to investigate the ankle joint power during stair ascent in different foot initial contact strategies and to find a better strategy. Twenty healthy young men performed stair ascent with two different initial contact methods, i.e., rear-foot strike and forefoot strike. Forefoot strike showed greater power generation than RFS and greater power absorption during forward continuance phase and weight acceptance phase, respectively. RFS would be advantageous in terms of ankle joint power.