What is the purpose of performing the Y raise with the client’s chest/trunk resting on a Swiss ball?/2022

What is the purpose of performing the Y raise with the client’s chest/trunk resting on a Swiss ball?

1. PROMOTE SPINAL EXTENSION
2. INCREASE STRESS ON THE INTERVERTEBRAL DISCS
3. INCREASE ACTIVATION OF THE ABDOMINALS
4. RESTRICT SPINAL EXTENSION