There are generally three reasons for arm pain in badminton. 1 is that the warm-up before exercise and the relaxation after exercise are not done well; Second, the way of exerting force is incorrect. To put it simply, the place where the force is exerted is not exerted, and the place where it should not be exerted is hard; Third, you are too nervous when playing badminton. In fact, the trick to playing badminton well is to relax the strength part. Only by relaxing can we achieve the explosive force of instant tension.

So I suggest you, 1, strengthen basic physical training, including upper limbs, lower limbs and fingers, wrists, ankles and other small joints; 2. Fully warm up before playing, and stretch and relax after playing; 3. Change the hitting method and refer to the badminton teaching video. Taking forehand golf as an example, the correct way to exert force is to close the wrist-expand the wrist (instantly)-and slightly rotate the forearm, and so on; 4. Establish a correct badminton concept. Strength is not absolute. Strength is an explosive force that is instantly tightened on the basis of complete relaxation of the power-exerting parts, rather than endurance like swinging a sledgehammer. First of all, it is necessary to develop a correct and relaxed ball-free swing, completely change the wrong hitting consciousness and way of tense muscles all over the body, make you stupid, and sell your stupid strength inefficiently, which will harm your health.

Finally, I wish you master the correct badminton method as soon as possible and enjoy the fun brought by badminton.

It's sad that such a detailed and sufficient answer has not been adopted! Fortunately, some friends agreed to comfort ~