Summer has come quietly, and many people are gearing up for swimming, and they really want to swim quickly. There are many butterfly strokes. When we begin to learn butterfly, we should first learn the action essentials of butterfly trunk and butterfly leg. So how do we learn the essentials of trunk and leg movements in butterfly stroke? Let's study together.

Objective: To master the fluctuating movements of the trunk and legs in butterfly stroke, and to learn waist and abdomen exertion is the basis of learning butterfly stroke.

Difficulty: Wave action.

The essentials of trunk and leg movements in butterfly stroke are as follows.

1, stand in place and raise your arms straight. Waist and abdomen swing back and forth, imitating the wave action of dolphins, and the consistency of standing, bending, lifting and stretching.

2, the principle of crawling water action, legs together at the same time to do up and down water action, experience the waist force, rhythmic up and down swing, whip water. Don't push too hard when moving up, but push hard when pressing water down.

Errors of trunk and leg movements in butterfly stroke and their correction

1, the calf bends and stretches to get water, and there is no wave. Reason: The trunk didn't take part in the action, only the calf was used to draw water. Correction: the trunk participates in the action, and the action is carried out in strict accordance with the order of lifting abdomen, bending knees, lifting hips and stretching knees to fetch water.

2. The head and shoulders fluctuate too much. Reason: the concept of action is unclear. Correction: the hands, head and shoulders are relatively fixed, and the waist and abdomen force the lower limbs to make waves.