Strength training can consume a lot of glycogen in muscles, which can make you transition to the fat function stage faster when punching sandbags. This can improve the fat-reducing effect.

The principle of muscle growth: muscles don't come out during exercise. In strength training, training will destroy muscles. Supplementing protein is used to replenish damaged muscles. In the process of supplementation, the original muscle fibers will gradually become larger, which is the basic principle of muscle growth. If you continue to train before the muscles recover, it will only be counterproductive. Therefore, strength training and protein's supplement are the key to muscle growth.

It is best to supplement protein within half an hour after strength training. If you drink protein powder, then you should drink more water.