Causes of muscle ligament strains and prevention methods: 1, internal causes: insufficient training level, flexibility, strength, poor coordination, poor physiological structure 2, external causes: inadequate preparation activities, venue, temperature, humidity, class content is not good, coach professional level is not enough 3, prevention: selection of coaches, venues and appropriate courses, exercise in normal weather conditions, adequate preparation activities, step by step. 4, treatment: 24 hours before the acute phase: methods: stop exercise, cold compresses, bandages, elevate the injured part. 5.After 24 hours is the recovery period: with massage, micro-movement, rehabilitation or restorative exercise.