Reverse Nordic leg curls

Alternatives -
  1. Kneel on a padded surface.
  2. Cross your arms, flex your core, and make sure your hips are aligned straight with your body.
  3. Breathe in and move your body backwards as far as you can by only bending through your knees.
  4. Pause at your deepest point.
  5. Breathe out and return to the starting position without bending your hips or your upper body.