Exercise guide
Lying Leg Raise Flat Bench
- Intermediate
- Compound
- Rep-based
- Waist
This exercise targets the lower abdominals and hip flexors by using a flat bench to provide a stable base for controlled leg elevation. It is highly effective for building core stability and strengthening the deep abdominal wall.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Lie flat on your back on a flat bench with your glutes positioned near the end of the bench.
- Reach back and firmly grip the sides of the bench or the top of the bench behind your head to anchor your upper body.
- Extend your legs fully, keeping them together and hovering just above the level of the bench.
How to do it
- Exhale and contract your abdominals to lift your legs toward the ceiling until they are perpendicular to the floor.
- Maintain a very slight bend in the knees to reduce strain on the lower back while keeping the movement focused on the hips.
- Inhale and slowly lower your legs back to the starting position using a controlled 3-second tempo.
- Stop the descent just before your heels touch the bench or the floor to maintain constant tension on the core.
Form checklist
- Keep your lower back pressed firmly against the bench throughout the entire movement.
- Avoid using momentum or swinging your legs to initiate the lift.
- Keep your neck in a neutral position and avoid pulling on the bench with excessive neck tension.
- Ensure your legs remain squeezed together to engage the adductors and stabilize the pelvis.
Pro tips
- Focus on a posterior pelvic tilt by pulling your belly button toward the bench to maximize lower abdominal recruitment and protect your spine.
- Pause for one second at the top of the movement to emphasize the peak contraction of the rectus abdominis.
Make it harder
- Add a 'hip thrust' at the top of the movement by driving your feet toward the ceiling and lifting your pelvis off the bench.
- Slow down the eccentric (lowering) phase to 5-6 seconds to increase time under tension.
Frequently asked
- What muscles does the lying leg raise flat bench work?
- The lying leg raise flat bench primarily targets the abs and obliques, and also works the adductors, glutes, hip flexors, and quadriceps as secondary muscles.
- What equipment do you need for the lying leg raise flat bench?
- The lying leg raise flat bench requires no equipment — just your body weight.
- Is the lying leg raise flat bench good for beginners?
- The lying leg raise flat bench is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.