Starting posture: Lie on your back on a flat bench with your feet flat on the ground. Bend your elbow and hold the dumbbell, with your fist facing your eyes and your palm facing your leg. The axis of the dumbbell is above the nipple 1 cm (in the middle of the pectoral muscle) and close to your chest.

Action process: push-ups, elbow contraction, elbow clamping and chest clamping. The dumbbell moves upward and leans forward slightly, showing a parabolic trajectory. When the arms are straight, the center of gravity of the dumbbell is close to the support point of the shoulder joint. But don't just sit on the support point of the shoulder joint, because this will make the bones support the weight of the dumbbell (this situation that the bones support the weight instead of the muscles supports the weight is called "locking"), which will make the chest muscles relax and affect the exercise effect. Then, make the two arms straight and open to both sides, and the two arms slowly bend, and the dumbbell falls vertically, and when it drops to the lowest place, it is pushed up. Say it again.

Breathing method: inhale when lifting and exhale when falling.

Number and times of groups:

1, reaching the limit of 6-8 times. After more than 8 times, other parts of the body will enter aerobic exercise; If it is less than 6 times, it means that the auxiliary muscle participates in the exercise, but the main muscle is not completely tired.

2, multi-group number: no matter which part of the body, you should practice one group after another until the synapse can't make an impulse. If you believe in overtraining, you can't meet this requirement. The so-called overtraining is just an excuse made up by cowards to cover up their incompetence. The real impact exercise should not only reach more than 20 groups, but also reach the limit number of times in each group. Don't count the warm-up group when counting the number of groups, although it is necessary.

3. Diversity of training. It is necessary to change the number and frequency of training groups and the arrangement of movements frequently, so as to break the adaptation of the body and obtain a breakthrough in muscle growth.