Which muscle is the woman using to lift the ball over her head?

Without a specific image or description, it's hard to determine exactly which muscles a woman would be using to lift a ball over her head. However, generally, the following muscles would be involved:

1. Deltoids: These are the muscles that cap the shoulders. They are primarily responsible for lifting the arms.

2. Biceps: Located in the upper arm, these muscles are used to flex the elbow, bringing the ball closer to the body.

3. Triceps: These muscles, also located in the upper arm, work in opposition to the biceps to extend the elbow, pushing the ball away from the body.

4. Trapezius and Rhomboids: These muscles in the upper back and neck help stabilize the shoulder blades, providing a solid base from which to move the arms.

5. Core muscles (including the Rectus Abdominis, Obliques, and Erector Spinae): These muscles stabilize the torso, allowing the upper body to move efficiently and with strength.

6. Latissimus Dorsi: These large muscles in the back help with the upward phase of lifting the ball.

Remember, the exact muscles used can vary depending on the specific way the ball is being lifted.