I am an athlete, and I will teach you some methods: some people are born with thick ankles, because they are congenital joints, and there is no special way. Here, let's talk about friends who are not born with big joints. Lift heel or lift heel, holding the wall with both hands, doing 4-5 groups every 30, once every other day, should achieve the effect. If you want to carry a load, you can do 10 in each group according to the weight you shoulder.

That's how I practice joint strength. I weigh 100 kg and do vertical jump. Hehe, of course you don't want to compete with me. As long as you do what I said above, it will have an effect. ...