One of the main jobs of the hamstrings is bending your knee, so it’s not surprising that weak hamstrings are one of the biggest causes of knee injuries. According to the American Academy of Orthopaedic Surgeons, women are two to 10 times more likely to sustain a knee ligament injury, such as an anterior cruciate ligament (ACL) tear, than men.
The medial collateral ligament (MCL) and anterior collateral ligament (ACL) are located in the knee joint. Both the MCL and ACL help connect the thigh and shin bones. Injuries to them are fairly common among adults, but strength training can do wonders for any knee ligament. Target muscles include the quadriceps, hip flexors, hamstrings and calves.