That is where the tendon and/or muscle is pulled too far in a particular direction; contusion, which is usually as a result of a direct blow to the muscle; tendonitis, this is, when the tendon becomes inflamed and over stressed often because of faulty technique, lack of flexibility and/or inappropriate equipment; and ligament sprain, when the ligament is stretched beyond its normal range.
Ankle Sprain usually has immediate pain with associated swelling and bruising at the site of injury. Severe sprains are distinguished where one may not be able to put weight or walk on the injured ankle. Rehabilitation is required to strengthen the ligaments again. Weak or unstable ankles often lead to repetitive ankle sprains.
Knee injuries are common in sports that involve sudden twisting turns or chronic overuse. One common injury is to the anterior cruciate ligament (ACL) or patella femoral tracking disorders where one experiences pain and swelling in the inner knee or just below the kneecap. A feeling of instability of the knee, popping or grinding in the knee is associated with cartilage or meniscus tears. Locking is the term used when the knee joint refuses to completely straighten, and this is almost always due to torn cartilage