Which statement about straight leg raising and quadriceps setting in chondromalacia patella is true?

Which statement about straight leg raising and quadriceps setting in chondromalacia patella is true?

• A. They increase patellofemoral joint reaction forces.
• B. They produce smaller patellofemoral joint reaction forces than some other quadriceps exercises.
• C. They recruit the vastus medialis exclusively.
• D. They are unlikely to improve patellar tracking.

Answer: (B)

Low patellofemoral joint loading is a central idea in managing chondromalacia patella while rebuilding quadriceps strength. When you perform a straight leg raise, the knee is held in near extension while you lift the leg, so the patellofemoral joint experiences minimal compression. Quadriceps setting is an isometric contraction with the knee straight, again keeping the knee extended and reducing PFJ contact. Because the patellofemoral joint compressive forces rise with knee flexion and with higher joint loading, these two movements generate smaller PFJ reaction forces compared with many other quadriceps strengthening exercises that involve more knee bending or dynamic loading. These exercises are useful early on to activate and maintain quadriceps strength without overloading the patellofemoral joint, which helps protect the cartilage while progress toward more challenging strengthening and motor control tasks. They do not recruit the vastus medialis exclusively, and while they contribute to overall quad function and can support better tracking as part of a broader rehab program, the key take-home is their relatively low PFJ load compared with other, more demanding quad exercises.

Low patellofemoral joint loading is a central idea in managing chondromalacia patella while rebuilding quadriceps strength. When you perform a straight leg raise, the knee is held in near extension while you lift the leg, so the patellofemoral joint experiences minimal compression. Quadriceps setting is an isometric contraction with the knee straight, again keeping the knee extended and reducing PFJ contact. Because the patellofemoral joint compressive forces rise with knee flexion and with higher joint loading, these two movements generate smaller PFJ reaction forces compared with many other quadriceps strengthening exercises that involve more knee bending or dynamic loading.

These exercises are useful early on to activate and maintain quadriceps strength without overloading the patellofemoral joint, which helps protect the cartilage while progress toward more challenging strengthening and motor control tasks. They do not recruit the vastus medialis exclusively, and while they contribute to overall quad function and can support better tracking as part of a broader rehab program, the key take-home is their relatively low PFJ load compared with other, more demanding quad exercises.