1, free diving is diving, and it is a sport that challenges the limits. Mermaid is webbed diving, that is, swimming and diving are combined, which is a mass sport.

2. Free diving pays attention to the whole breath-holding and leg swimming from the sports point of view. Mermaid is to shape the mermaid line, waist, abdomen and buttocks hard, and the weight loss effect is obvious.

3. Free diving is mostly carried out in deep water, especially in the sea. To appreciate the scenery under the sea, you need to have a swimming foundation. The basic action of mermaid is to learn in swimming and upgrade the marine mermaid through technical clearance.