Exercise guide
Captains Chair Straight Leg Raise
- Intermediate
- Isolation
- Rep-based
- Waist
The Captains Chair Straight Leg Raise is a potent core exercise that targets the lower rectus abdominis and hip flexors by using the weight of the legs as a long lever. It provides excellent spinal support via the backrest, allowing for intense abdominal isolation and improved pelvic stability.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Position yourself in the Captain's Chair with your forearms resting on the padded armrests and hands gripping the handles.
- Press your lower back firmly against the backrest and engage your lats to keep your shoulders down and away from your ears.
- Suspend your legs straight down toward the floor, squeezing your thighs together and pointing your toes slightly.
How to do it
- Exhale and engage your core to lift your legs straight out in front of you until they are at least parallel to the floor.
- At the top of the movement, perform a slight posterior pelvic tilt by 'tucking' your hips forward to maximize abdominal contraction.
- Inhale and slowly lower your legs back to the starting position over a 2-3 second count, maintaining tension in the abs.
- Stop the descent just before your legs go behind your torso to prevent swinging and maintain constant tension.
Form checklist
- Keep your back glued to the backrest; do not let your lower back arch away from the pad.
- Avoid using momentum or swinging your legs to initiate the lift.
- Keep your knees locked and legs fully extended throughout the entire range of motion.
- Ensure your shoulders remain depressed; do not let your head 'sink' into your shoulders.
Pro tips
- To shift the focus from hip flexors to the abs, visualize pulling your pubic bone toward your ribcage as you lift.
- Maintain a slight 'hollow body' position even at the bottom of the rep to keep the rectus abdominis under continuous load.
Make it harder
- Add a 2-second isometric hold at the top of each repetition when legs are parallel to the floor.
- Hold a light dumbbell between your feet to increase the resistance and challenge the lower abdominals further.
Frequently asked
- What muscles does the captains chair straight leg raise work?
- The captains chair straight leg raise primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the captains chair straight leg raise?
- The captains chair straight leg raise requires no equipment — just your body weight.
- Is the captains chair straight leg raise good for beginners?
- The captains chair straight leg raise is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.