Friend: sandbags are not all sand or coarse sand, which will hurt your hands. So you have to add 40% sawdust and 60% sand, or 70% sand and 30% sawdust. You can also light it first and then heavy it, and then give you a trick. Playing thousands of layers of paper doesn't hurt your opponent very much. To sum up, you should practice boxing step by step. At the same time, buy a bottle of safflower oil. If you wash it every day after playing, it will make your blood live more and make your bones and muscles more flexible. Second, when making sandbags, we should also pay attention to the use of canvas, especially the postal bag of the post office is the first choice. You can make one with a blue ball. Of course, according to your habit, you can also buy one, which is lighter but more expensive.

Have fun!