When we practiced martial arts in our hometown when we were young, the master forbade us to tie sandbags and sand vests for a long time, because the sand was worn for a long time and it hurt our blood. If you like long-term exercise, you'd better wear a sand vest, but it's filled with soybeans or mung beans, because it's easy to make blood flow by tying leggings to your body!
The effect is good, which is helpful for jumping ability and endurance!
If you are a minor, I don't advocate that you exercise like this. Your body is still in the primary stage, and it is not suitable for heavy-load endurance training, which is not good for your growth and development!
When you are an adult, you should do it step by step, and you can't rush it!