Your anterior cruciate ligament (ACL) is located within the knee joint and stops the tibia from sliding forwards on the femur.
Iliotibial Band Syndrome (ITBS) describes damage to the iliotibial band (ITB) where it crosses the outside of the knee.
PFPS is a painful condition affecting the knee that will affect 25% of people at some point in their lives. It’s even more common in runners, hence being known as runner’s knee.