蝶泳的第三的要素是体能管理，蝶泳中双臂与双腿的移动需要耗费游泳者巨大的体能。高超的游泳时机与形态能在这种体能管理下实现。蝶泳的训练需要兼顾这种（需要大量体能）的动作和保持游泳技术的完整性。（也就是既要练身体，也要练技术）
(The third element of butterfly swimming is energy management. The double arm and leg movement in butterfly swimming call for tremendous amount of power to be employed by swimmer. Crack stroke timing and form can right down quickly under this energy management. (…?) butterfly training program is designed in condition of stroke while maintaining the integrity of swimming technique. )
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