Leg pain after exercise is usually due to a large number of activities after the accumulation of lactic acid in the muscle, as well as muscle strains caused by the need to do targeted treatment for the cause, first of all, we should drink more warm water, can promote the body metabolism to speed up, lactic acid can be absorbed relatively quickly, the pain can be reduced. You can also use hot water bags for local muscle heat, can promote the metabolism of lactic acid, while helping the muscle recovery. You can also consume vitamin-rich foods, such as dragon fruit, apples, kiwi, etc., which can promote the repair of muscle fibers. If time and financial ability allow, physical therapy for the legs can be done, which also helps recovery and can reduce pain. And for a short period of time, you should reduce your activities so that your body can return to normal, and increase the amount of exercise gradually when you exercise again in the future.