The butterfly stroke is one of the more difficult swimming strokes because it requires a specific style, and it needs a lot of stamina.

The fundamental motion of freestyle kick drills involves: lay your body flat, keep your tiptoes straight, kick in with straight legs, use your thigh driving your leg and kick up and down by your legs alternatively.

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Before you prepare for learning swimming by yourself, you need to have a full understanding of characteristics of human body and water firstly. Only in this way can you make full use of your own advantage and have a command of water characteristics.