semitendinosus action

### Hip extension and stabilizes the pelvis in the sagittal plane. Knee flexion and internal tibial rotation when knee is flexed.

## Step1: Identify the primary action of the semitendinosus### The semitendinosus muscle is one of the hamstring muscles located at the back of the thigh. Its primary action is hip extension, which means it helps in moving the hip backward.## Step2: Recognize the secondary action related to the pelvis### Besides hip extension, the semitendinosus also stabilizes the pelvis in the sagittal plane, ensuring balance and proper alignment during movement.## Step3: Acknowledge the knee-related actions### The semitendinosus is also involved in knee flexion, which is the bending of the knee. Additionally, it contributes to internal tibial rotation when the knee is flexed, aiding in the movement and stability of the knee joint.