Muscle injuries account for more than 30% of the injuries sustained in sports events. Muscle strains occur when one or more muscles are stretched beyond their limit or are in a vulnerable position. When this happens, the muscle tissue becomes strained or torn. Acute muscle strains are caused by a direct hit, fall, or from overloading, whereas chronic muscle strains are due to overuse (repetitive stress) or from prior unhealed injuries. Muscle injury damage can range widely from small strains to partial and complete ruptures. Complete ruptures are serious injuries. In professional sports, these injuries can cause pain and disability. Although the great majority of muscle injuries are treated non surgically, in some subtotal, total, or avulsion injuries, as well as relevant complications such as painful or dysfunctional scars, adhesions to other tissues (nerves), cystic hematoma, and symptomatic ossifying myositis, surgical repair should be considered as preferential solution for the healing process.