When performing the seated leg extension, there are specific muscles involved in shifting the hips up and down or side to side without compromising the leg extension movement. These muscles primarily include:
Hip flexors: The hip flexor muscles, such as the iliopsoas and rectus femoris, play a significant role in lifting the hips up during the exercise.
Hip adductors and abductors: The hip adductor muscles, located on the inner thigh, and the hip abductor muscles, situated on the outer hip, are responsible for controlling side-to-side movements of the hips while maintaining stability.
Core muscles: The muscles of the core, including the abdominals and lower back muscles, provide stability and support during hip movements, ensuring proper alignment and preventing excessive swaying or tilting.
It is important to engage these muscles in a controlled manner while maintaining proper form to shift the hips without compromising the leg extension movement. This helps to ensure optimal muscle activation, reduce the risk of injury, and enhance the effectiveness of the exercise.