Relax Your Arms

Besides relaxing your kua, which is very important, one more mistake that I commonly make is to use my arms' muscular strength to move my arms when I am practising my forms. Strength should come from the legs, and through turning your kua, the strength gets transferred to the arms to move them. And in order for that to happen, you need to relax your arms (shoulder, elbow, wrist) as well.

So while you concentrate on relaxing you kua and turning your kua using your legs (see pushing with your legs), you must also remember to relax your whole upper body, so that the strength generated from your legs can actually get through to your hands.