HMS, BM EQ-Bank 836 MC When performing a squat, which muscle acts as a stabiliser for the knee joint? Rectus femoris Biceps femoris Vastus medialis Gluteus maximus Show Answers Only \(C\) Show Worked Solution C is correct: Vastus medialis stabilises the knee during squats. Other Options: A is incorrect: Rectus femoris is an agonist for knee extension B is incorrect: Biceps femoris is a hamstring antagonist D is incorrect: Gluteus maximus extends hip, not knee stabiliser