I was interested to learn how you guys develop a strong wrist. In one of the styles of Hapkido that I study, we do 'Ki Exercises' where the fingers are fully outstretched as we do controlled breathing and body movements. The idea of ki exercises is to not only build 'ki' or internal energy in the body, but also to build muscle in the wrist. Whenever someone grabs your wrist, the idea is to make a Ki Hand, and that actually loosens the grip of your attacker from the muscle expanding in the wrist just enough to where you can 'break-away'. Anyway, that is just my background on the 'Ki Hand', and I understand everyone's training is different. So my question is this: What exercises do you do to build strong wrist muscles? What exercises produce the best results? I was thinking that, besides my regular ki exercises, that I would build a spring based finger gripping device that produces tension everytime you flexed your fingers.