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Are you interested in getting even more powerful shots in badminton? The secrets can be found in the grip and the way you rotate your forearm. It's really not about the wrist, that's a misconception - but the forearm is the reason many players hit harder with more ease than others.

How To Use Fingers and Wrist For POWERFUL shots in Badminton?
In general the fingers must hold loose around the badminton racket. Mostly carried by the thumb and pointing finger. The middle finger might rest and help a small amount. When you are to hit the shuttle you (1) When shuttle approach the racket rotate the forearm in the direction you want to hit (2) Just when the shuttle is about to hit the strings squezze or tighten up your grip to make a more powerful shot.

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Hope this badminton tutorial help you out :-)