Group Fitness Instructor

Answer: A - The best definition of a sprain is an injury to a ligament caused by a sudden trauma to a joint. Sprains can occur at any joint, but are most common at the ankle and knee. Injuries to muscle, called a muscle strain, can also be caused by sudden trauma or by chronic overuse. Stress fractures, often seen in the bones of the spine, lower legs and feet, are typically the result of repeated micro-trauma to the bone, not a one-time event.