鱼式游泳(Total Immersion 完全沉浸)是一套四式训练方法 针对 铁人三项 及成人游泳 讲求有效率的游泳 提倡的是用重心移动的方式，利用身体核心转动作为来加强前进的力量，利用平衡来减少阻力。避免不必要的出力，而且尽量的依照人体工学的放松法则来运动。

捷式基本动作： 课程内容包含了 放松 Relax 平衡corebody balance(核心平衡 ) kating(水下滑行) 重心转移 underswitch(水下换手) 二拍打水 2 beat kick 禅式换手Zenswitch(拉链换手) 换气 Breathing 主动鱼式 Active Fish 高肘定锚 High Elbow Anchor

Total Immersion Inc. is a US based company with international affiliates (e.g. Total Immersion Europe GmbH, Switzerland). Total Immersion (TI) is a method of swimming instruction, developed by Terry Laughlin, an American swimming coach. Its primary focus is to teach swimmers to move through the water efficiently. By conserving energy and focusing on balance and streamlining in the water, any energy used for propulsion becomes much more effective. Basic principles of teaching include sustainability of effort, drag reduction, vessel shaping and full body swimming.