Movement - core: Gluteus Maximus.

• A. Rectus Abdominis
• B. Latissimus Dorsi
• C. Gluteus Maximus
• D. Hamstring Complex

Answer: (C)

The movement in this context relies on hip extension—the action that powers many core-based moves. The gluteus maximus is the primary hip extensor, meaning it is the main muscle responsible for driving the thigh backward from a flexed position and helping stabilize the pelvis during movement. Because this action is central to how the core and lower body generate power and control alignment, the gluteus maximus is the best fit.

Rectus abdominis mainly flexes the spine, not extend the hip. Latissimus dorsi acts on the upper body and shoulder region, not on hip extension. The hamstring complex does assist with hip extension, but it works as a secondary mover and also crosses the knee, making it less central to hip-extension–dominant core actions.