Playing badminton has a swing action, very need arm strength, if there is a long period of time without these exercises, or always do these exercises, can lead to arm weakness. The former is because a long time without strenuous exercise, there are more anaerobic muscle activity, will produce the symptoms of soreness and weakness, generally more rest to do hot compresses, massage physiotherapy, about a week will be able to gradually ease, the latter is because a long time playing badminton, strain strain more than the range of muscle strength can withstand, this time to reduce the amount of exercise, more hot compresses, massage physiotherapy will be recovered by, a long time will lead to strain and strain pain.