Increase the cross-sectional area of muscle. Generally speaking, the larger the muscle volume (cross section), the greater the strength.

The strength is also related to the number of muscle fibers controlled by neurons, and the proportion of muscles that can be mobilized in each movement increases.

Flexible training is the way to reduce the internal resistance of the body-the resistance between muscle groups and the resistance of joints. Improve the coordination among active muscle, cooperative muscle and antagonistic muscle. That is, when muscles contract, the active muscles can contract, while the antagonistic muscles can fully relax, which is also the main factor affecting the strength, especially the relaxation ability of the antagonistic muscles.

Finally, increase the acceleration of the movement.

If you don't want to increase the dimension, you need to train your brain to control your muscles, so that you can mobilize the most muscles to participate in each exercise. This can be achieved through routine training. Flexibility is actually related to the control of nerves on muscles. Many great bodybuilders have good flexibility.