Hip abductors
The hip abductors sit on the outer side of the hip. They lift the leg out to the side and keep the pelvis level when you walk, run or stand on one leg. Weak abductors are a common reason knees cave inwards during squats. This group includes the abductor machine, resistance band drills and stretches for the iliotibial band. They work well as a warm-up before leg day or as part of rehabilitation after a minor injury.