Exercise guide
Suspender Reverse Crunch
- Intermediate
- Compound
- Rep-based
- Waist
This exercise utilizes the instability of the suspension trainer to intensely target the lower abdominals and hip flexors while building total-body stability. It is highly effective for developing core control and improving the mind-muscle connection with the deep abdominal wall.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Adjust the suspension straps so the foot cradles are at mid-calf height.
- Place your feet into the cradles and assume a high plank position with hands directly under your shoulders.
- Engage your core and glutes to create a straight line from head to heels.
How to do it
- Exhale and pull your knees toward your chest by flexing your hips and rounding your lower back slightly to engage the abs.
- Pause for a second at the peak of the contraction, squeezing your core tight.
- Inhale and slowly extend your legs back to the starting plank position using a controlled 2-second tempo.
- Ensure your hips do not sag below the midline as you return to the starting position.
Form checklist
- Keep your shoulders stacked directly over your wrists throughout the movement.
- Avoid letting your lower back arch or 'dip' during the extension phase.
- Keep your neck neutral by looking at a spot on the floor just ahead of your hands.
- Maintain constant tension on the straps; do not let them saw back and forth.
Pro tips
- Imagine pulling your belly button toward your spine as you tuck your knees to maximize deep core activation.
- Press actively into the floor with your hands to stabilize your shoulder girdle and engage the serratus anterior.
Make it harder
- Perform the movement from a forearm plank position to decrease your base of support and increase core demand.
- Slow down the eccentric (extension) phase to 4 seconds to increase time under tension.
Frequently asked
- What muscles does the suspender reverse crunch work?
- The suspender reverse crunch primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the suspender reverse crunch?
- The suspender reverse crunch uses suspension trainer.
- Is the suspender reverse crunch good for beginners?
- The suspender reverse crunch is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.