How to do: Suspended Reverse Crunch

Step-by-step instructions

1. 1Secure a set of suspension straps with the handles hanging about a foot off of the ground. Move yourself into a pushup plank position facing away from the rack.
2. 2Place your feet into the handles. You should maintain a straight posture, not allowing the hips to sag. This will be your starting position.
3. 3Begin the movement by flexing the knees and hips, drawing the knees to your torso. As you do so, anteriorly tilt your pelvis, allowing your spine to flex.
4. 4At the top of the controlled motion, return to the starting position.

Photos & base instructions from the open-source Free Exercise DB (public domain).