Anterior Cruciate Ligament (ACL) injuries are one of the most common types of knee trauma athletes suffer. Though anyone can experience an ACL injury, this type of trauma is associated with athletes because it is caused by a quick stop movement which tends to happen more in competitive activity than in daily life.
Your hamstrings play a critical role in many motions and movements required for high and low-impact sports. Each leg has three hamstrings, all of which are involved in knee movement and, to some degree, hip movement as well. When any one of these muscles stretch beyond its limit during physical activity, injury can result.