If your foot feels tense, stand with one hand on a wall for support and place the arch of one foot on top of the ball.
如果你的脚很紧张，一只手倒站在墙面支撑着把一只脚放在球上形成一个拱门。
2
Use the ballof the foot, not your heel.
用脚前掌而不是脚跟。
3
If you notice that your shoes are wearing in the normal pattern, from the outside of the heel to the ballof the foot, that means you are a normal pronator.