Playing basketball leg soreness, may be related to physiological factors, may also be leg muscle strain, lumbar intervertebral disc herniation and other causes. 1. Physiological factors: For example, if you seldom play sports and suddenly play basketball for a long time, excessive running and jumping will easily lead to excessive accumulation of lactic acid in your leg muscles, which will cause your legs to become sore and weak when you play basketball. 2. Leg muscle strain: if you don’t warm up well before playing basketball, it is likely to lead to leg muscle strain, which will cause leg soreness and weakness, and may be accompanied by pain, weakness and other manifestations. 3. Lumbar disc herniation: there has been a slight lumbar disc herniation, if you accidentally twist your waist when playing basketball, it will aggravate the lumbar disc herniation, leading to local nerve root compression, causing leg soreness and weakness, and may be accompanied by lumbar pain, numbness of the leg and other symptoms. Playing basketball leg soreness and weakness, after excluding physiological factors still can not be relieved, it is recommended to go to the regular hospital for examination and treatment.