Exercise guide
Sitting StepOut Knee Tuck On A Padded Stool
- Beginner
- Compound
- Rep-based
- Lower legs
- Upper legs
- Waist
This beginner core exercise targets the lower abdominals and obliques while engaging the quadriceps through a seated tucking motion. It improves hip flexor strength and trunk stability by utilizing a padded stool to provide a controlled range of motion.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Sit on the front edge of a padded stool with your feet flat on the floor and knees bent.
- Place your hands behind your glutes on the stool for support and lean your torso back at a 45-degree angle.
- Engage your core and lift your chest to maintain a neutral spine.
How to do it
- Exhale as you pull your right knee toward your chest while simultaneously stepping your left foot slightly outward for balance.
- Inhale as you return the right foot to the floor and reset your posture.
- Repeat the movement by tucking the left knee toward the chest while the right leg steps out to stabilize.
- Maintain a steady, controlled tempo, focusing on the contraction in the lower abs and obliques.
Form checklist
- Keep your back straight; avoid rounding the lumbar spine as the knee tucks.
- Ensure the movement is driven by the core rather than just the hip flexors.
- Keep your shoulders down and away from your ears to avoid neck tension.
- Maintain a light touch with your hands to ensure the abdominal muscles are doing the majority of the work.
Pro tips
- Imagine pulling your belly button toward your spine during the tuck to maximize deep transverse abdominis activation.
- Pause for a half-second at the peak of the tuck to emphasize the oblique engagement and peak contraction.
Make it harder
- Hover both feet off the ground throughout the entire set to maintain constant tension on the abdominal wall.
- Extend the non-tucking leg fully straight out in front of you to increase the lever length and core demand.
Frequently asked
- What muscles does the sitting stepout knee tuck on a padded stool work?
- The sitting stepout knee tuck on a padded stool primarily targets the hip flexors and quadriceps, and also works the abs, glutes, and obliques as secondary muscles.
- What equipment do you need for the sitting stepout knee tuck on a padded stool?
- The sitting stepout knee tuck on a padded stool requires no equipment — just your body weight.
- Is the sitting stepout knee tuck on a padded stool good for beginners?
- Yes. The sitting stepout knee tuck on a padded stool is a beginner-friendly movement and a strong foundation to build on.
Related exercises
- Barbell Hang CleanAdvanced · erector spinae, glutes, hamstrings, hip flexors, and quadriceps
- Deep Squat Reach Forward Reach UpBeginner · glutes, hip flexors, and quadriceps
- Double Knee Side ThrustIntermediate · glutes, hip flexors, and quadriceps
- Down To Upward DogIntermediate · abs, erector spinae, glutes, hip flexors, obliques, and quadriceps