1, limit or heavy weight, adopt the second breathing method.

Take two or three deep breaths before the action begins. Inhale at the beginning of exercise until the "contraction peak" or the exercise is in place, that is, exhale for a very short time, then inhale continuously for a short time until the exercise approaches the previous stage or resumes.

2, according to the human physiological phenomenon of breathing methods:

No matter which action, when the chest ribs and lungs are in an expanded state, they use "inhalation" and when the chest ribs and lungs are in a compressed state, they use "exhalation". This exhalation method will not cause the lungs to be compressed or hold their breath.

3. In the whole movement process, from the "starting position" to the "ending position", as a breathing method of a breathing unit; It is to "inhale" from the beginning of the action until it returns to the middle stage or "exhale" until the last 1/3 is left.