Which muscle group is responsible for flexing the leg at the knee joint?

The hamstrings are the muscle group responsible for flexing the leg at the knee joint. This group is comprised of three muscles located at the back of the thigh: the biceps femoris, semitendinosus, and semimembranosus. When these muscles contract, they pull the lower leg towards the back of the thigh, effectively bending the knee.

Understanding the role of the hamstrings is essential for anyone involved in aquatic fitness or exercise science, as they play a critical role in various movements, including walking, running, and jumping. Strengthening the hamstrings can enhance performance and reduce the risk of injuries, especially in activities that require abrupt changes in direction or speed. Additionally, a balanced development of the hamstrings compared to the quadriceps is vital for maintaining proper knee stability and function.