On which side of the knee do the semimembranosus and semitendinosus muscles attach?

The semimembranosus and semitendinosus muscles attach on the medial side of the knee. These muscles are part of the hamstring group located at the back of the thigh and are primarily responsible for knee flexion and hip extension. Their positioning on the medial side is significant because it contributes to the stability of the knee joint, especially during movements that require balance and control.

The semimembranosus plays a role in internal rotation of the tibia, while the semitendinosus assists in both flexion of the knee and stabilization of the joint. Their attachments help maintain proper alignment and function of the knee, underlining their importance in athletic activities and daily movements. Understanding this anatomical relationship is vital for personal trainers addressing injuries or designing rehabilitation programs, as it informs exercise selection that supports knee health and function.