Are your wrists particularly inflexible? I would think that if you are properly cocking your wrist (mostly flexion) and rotating your forearm (pronation & supination), wrist flexibility should not be too much of an issue. It is also important to relax the forearm muscles. This is best accoplished by not gripping the racket handle too tightly. Most of the time you should loosely hold the grip up in the fingers (rather down than the palm as 1 would hold a tennis racket). Let the fingers tighten up naturally as the racket head is accelerated. Also make sure that the grip size of your racket is not too large for your hand... this can also impair wrist flexibility. If you still feel that you need exercises for your wrist flexibility, read on. It's not that easy to describe these types of exercises so I'll just try to give you a general idea. Try some wrists rolls along with wrist flexions & wrist extensions . You can perform various exercises with hands apart and also with the fingers of both hands clasped together. Also, shake & roll your hands in various directions to loosen & relax the wrist tendons. After you have warmed up a bit & have performed various loosening exercisies, do some wrist stretches in various directions. Some of the stretches may be similar to the exercises above (except that the stretches would be extended range & more static than dynamic in nature). You can perform wrist extension stretches while curling the fingers & pronating the hand & forearm. Aikido warmups often include a number of wrist stretches the could prove helpful for badminton. Try some of the following http://www.bodymindandmodem.com/KiEx/Kote.html http://www.bodymindandmodem.com/KiEx/nikyo.html http://www.bodymindandmodem.com/KiEx/Sankyo.html
