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.

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.

Original article and pictures take https://livestrong.com site