Exercise guide
Seated Knee Raise Leg Raise On A Chair
- Intermediate
- Compound
- Rep-based
- Waist
This exercise targets the lower abdominals and hip flexors by using a seated position to stabilize the upper body, making it an excellent beginner-friendly movement for core strength. It improves trunk stability and hip mobility while minimizing strain on the lower back.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Sit on the front edge of a sturdy, stable chair with your feet flat on the floor.
- Grip the sides or the front of the seat firmly to stabilize your upper body.
- Lean back slightly while keeping your spine neutral and your chest lifted.
How to do it
- Exhale and engage your core to pull both knees toward your chest in a controlled motion.
- Pause for a second at the top, squeezing your abdominal muscles tightly.
- Inhale as you slowly lower your legs back toward the floor, stopping just before your feet touch the ground to maintain constant tension.
- Maintain a controlled tempo, avoiding any swinging or use of momentum.
Form checklist
- Keep your chest up and shoulders back to avoid rounding the spine.
- Ensure the movement comes from your abs and hips, not by pulling with your arms.
- Keep your neck in a neutral position, looking straight ahead.
- Maintain a slight lean back throughout the entire set to keep the core engaged.
Pro tips
- Focus on tilting your pelvis toward your belly button at the top of the lift to maximize the contraction of the lower rectus abdominis.
- Squeeze your knees and ankles together throughout the movement to increase stability and inner core engagement.
Make it harder
- Straighten your legs completely to perform a Seated Leg Raise, which increases the lever arm and intensity.
- Slow down the eccentric (lowering) phase to four seconds to increase time under tension.
Frequently asked
- What muscles does the seated knee raise leg raise on a chair work?
- The seated knee raise leg raise on a chair primarily targets the abs and obliques, and also works the hip flexors as secondary muscles.
- What equipment do you need for the seated knee raise leg raise on a chair?
- The seated knee raise leg raise on a chair requires no equipment — just your body weight.
- Is the seated knee raise leg raise on a chair good for beginners?
- The seated knee raise leg raise on a chair is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.