Get it Done Fitness

Plank on a Swiss ball:

This is a variation of the static plank. There are two possible executions: You can place your forearms on the Swiss Ball with your feet on the ground or you can place your feet on the ball with your forearms on the ground. Keep your abs and gluteus tight, and do not arch your back. Hold this position as long as possible. Move the ball slightly from side to side for an advanced movement.