Emphasize the feel of each stroke phase being taught or improved - teaching aids such as paddles , fins , and surgical tubing may help to improve sensory input.

要着重讲授或改善每个划臂阶段的水感- -讲授象划水掌、脚蹼和外科医用胶管等训练辅助物的使用，将会有助于提高感官知觉的输入。