Long-distance running is not recommended if you can sprint. If it is not a professional sport, don't use it. It is also a waste to buy it, and the short-term effect is not so good, which also affects your height.
If you really want to buy it, buy it from 3 kg to 5 kg. If it is heavy, you can't carry it.
It is recommended to buy ordinary sandbag leggings and find cheap ones.
Some advanced ones are filled with steel balls or iron blocks, which I personally feel is not practical.
Leggings are mainly used to exercise explosive power, suitable for sprinting, and it doesn't matter whether leggings are used for long-distance running. There is no need to waste money on this, and it is easy to break down.