I practiced serving in a hotel recently. After practice, my left arm hurts and I can't lift it. I have no strength at all. Who can tell me how to reply quickly?

You seem to work in a hotel. According to your professional needs, you really need to strengthen your arm strength, but it is impossible to insist on special training. You should plan it yourself. Exercise in your spare time. Sell a pair of dumbbells and practice at home three times a week. Jogging for 45 minutes increases strength. The strength of the endplate depends not only on the strength of the arm, but also on the stability of the whole body, which requires the support of the body. Muscle soreness is the time to "increase" muscle strength. But if the internship is already very tired, don't practice again during the internship. After each internship, learn to relax your limbs. First, shaking exercises. Second, put your arms flat on the bed and relax immediately. Third, knead, completely flat without force, knead with the other arm, and pay attention to the inside of the muscle to avoid rubbing the skin epidermis. Fourth, Pat. Good luck.