Stronger

Captains Chair Knee Raise

Captains Chair Knee Raise demonstration

Category

isolation

Difficulty

beginner

Equipment

machine

Force Type

pull

How to Perform the Captains Chair Knee Raise

  1. Step onto the captain's chair and position your back flat against the backrest. Place your forearms on the padded arm rests and grip the handles.
  2. Allow your legs to hang straight down with your feet off the floor. Engage your core and keep your back pressed against the pad.
  3. Slowly raise your knees toward your chest by flexing your hips and contracting your lower abs.
  4. Continue raising your knees until your thighs are at least parallel to the floor, or higher for greater abdominal engagement.
  5. Pause briefly at the top and squeeze your abs, then slowly lower your legs back to the starting position under control.
  6. Avoid swinging your legs or using momentum. Each rep should be performed in a slow, deliberate manner.

Common Mistakes to Avoid

Swinging the legs for momentum

Initiate the movement from your abs, not your hip flexors. If you cannot avoid swinging, reduce your tempo.

Not raising the knees high enough

Bring your knees at least to hip level or higher. Stopping too low limits abdominal engagement.

Arching the lower back

Keep your back firmly pressed against the backrest. A slight posterior pelvic tilt at the top increases ab activation.

Muscles Worked

Benefits

  • Effectively targets the lower portion of the rectus abdominis, which is often difficult to isolate.
  • The supported position reduces strain on the lower back, making it safer than hanging variations for beginners.
  • Builds core strength that transfers to improved performance in compound lifts and athletic movements.

Pro Tips

  • Focus on curling your pelvis upward at the top of the movement rather than just lifting the knees to maximize ab contraction.
  • Exhale as you raise your knees and inhale as you lower them to maintain proper breathing and core engagement.
  • To increase difficulty, hold the top position for 2-3 seconds or add a light dumbbell between your feet.

Variations

Recommended Sets & Reps

Strength

4-5 sets of 8-10 reps (add weight between feet)

Hypertrophy

3-4 sets of 12-15 reps with controlled tempo

Endurance

2-3 sets of 20-25 reps at bodyweight

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