Position yourself inside a captain’s chair with your feet on a platform or steps, back against the pad, and forearms flat on the pair of padded parallel bars.
Bring your shoulders back and contract your abs.
Step off the platform or steps and support yourself with your upper body musculature. Keep your shoulders in position and avoid slumping.
Take a breath and engage your abs to raise your knees as high as possible in one fluid motion. Breathe out at the top.
Lower your knees to the starting position, extending them on the way down, and stop before your lower back begins to arch. Breathe in on the way down.