Abstract: The knife bridge structure of speed skating skates is quite different, and its energy consumption on Athletes' lower limbs is also different. Through the energy test between the traditional clap skates with different knife bridge structures and the new clap skates, it is found that the surface EMG work of the new clap skates with the new knife bridge structure on the rectus femoris, anterior tibial muscle, long peroneal muscle and posterior tibial muscle is significantly different from that of the traditional skates. The new clap skates can save the athletes' energy loss of lower limbs.