After frog jumping, the leg is too weak to stand up, which is mostly seen in the leg muscle lactic acid accumulation and leg muscle strain, the recovery time of different conditions is different, lactic acid accumulation can be recovered in 3~5 days, while the recovery time of muscle strain is determined by the severity, the mild one will be recovered in about 1 week, while the serious one will need 2~3 months. 1. Lactic acid accumulation: mainly seen in frog jumping too much exercise, the metabolites produced by too much lactic acid caused. Mostly after muscle massage, hot compress treatment, 3~5 days of time to return to normal. 2. Muscle strain: mild muscle strain, only a small amount of muscle fiber damage, after resting, generally a week to recover. If the muscle strain is serious, the recovery time is longer, in the external fixation or surgical repair and other treatments, often need 2 to 3 months to recover, some patients even need a longer period of time. It is recommended that patients go to the hospital, improve the auxiliary examination, clear the cause of the disease, treatment by a professional physician, drugs need to be used under the guidance of a professional physician.