Exercise guide
Sitting Air Bike On A Chair
- Intermediate
- Compound
- Timed hold
- Lower legs
- Upper legs
- Waist
This seated variation of the bicycle crunch targets the rectus abdominis and obliques while engaging the hip flexors and quadriceps. It is an effective beginner-friendly core exercise that improves rotational stability and coordination without requiring floor work.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Sit on the front edge of a sturdy chair or flat bench with your feet flat on the floor.
- Place your hands lightly behind your ears with elbows flared out, or grip the sides of the chair for extra stability.
- Lean your torso back slightly (about 30-45 degrees) while keeping your spine neutral and chest lifted to engage the core.
How to do it
- Lift both feet off the floor and exhale as you drive your right knee toward your chest while rotating your torso to bring your left elbow toward that knee.
- Inhale as you return to the center lean, then immediately repeat on the opposite side, bringing your left knee toward your right elbow.
- Continue alternating sides in a smooth, rhythmic 'pedaling' motion, keeping your feet hovering off the floor the entire time.
- Maintain a controlled tempo, focusing on the quality of the abdominal contraction rather than speed.
Form checklist
- Rotate from the ribcage and mid-back rather than just pulling your elbows forward.
- Keep your chest open and avoid pulling on your neck or tucking your chin to your chest.
- Ensure your lower back remains stable; do not allow it to excessively arch as you extend your legs.
- Keep your core braced and belly button pulled in toward your spine throughout the movement.
Pro tips
- To maximize oblique engagement, focus on bringing the shoulder toward the opposite knee rather than just the elbow.
- Slow down the leg extension phase to increase time under tension for the lower abdominals.
Make it harder
- Extend the non-working leg fully straight and hold it just above the floor to increase the lever arm and difficulty.
- Perform the movement with your arms extended straight overhead to shift the center of gravity and increase the demand on the core.
Frequently asked
- What muscles does the sitting air bike on a chair work?
- The sitting air bike on a chair primarily targets the abs and obliques, and also works the erector spinae and glutes as secondary muscles.
- What equipment do you need for the sitting air bike on a chair?
- The sitting air bike on a chair requires no equipment — just your body weight.
- Is the sitting air bike on a chair good for beginners?
- The sitting air bike on a chair is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.