Side Crunch with Hands on Chest
- Target muscle
- —
- Equipment
- Body weight
- Body part
- Waist
- Type
- Strength
The side crunch with hands on chest is a bodyweight floor exercise that targets the obliques and lateral core by using lateral flexion rather than forward flexion. Keeping your hands crossed on your chest removes neck strain from the equation, making it a straightforward way to isolate the sides of your core.
How to do the Side Crunch with Hands on Chest
- 1Lie on your back on a flat surface with your knees bent and feet flat on the floor, hip-width apart.
- 2Cross your hands over your chest, one on top of the other, so your arms are relaxed and off the floor.
- 3Let both knees tilt to one side until your legs rest comfortably at roughly a 45-degree angle, anchoring that hip to the floor.
- 4Brace your core lightly and fix your gaze toward the ceiling to keep your neck neutral.
- 5Exhale and lift your upper body by shortening the distance between your lower ribs and your hip on the same side as your tilted knees. This is a short, controlled lateral crunch — not a full sit-up.
- 6Hold the contracted position for a brief pause, feeling the squeeze along the side of your torso.
- 7Inhale and lower your upper body back to the floor under control, without fully relaxing your core before the next rep.
- 8Complete all reps on this side, then tilt your knees to the opposite side and repeat.
Form tips
- Keep the movement small and deliberate — you are shortening the side of your torso, not trying to sit all the way up.
- Let your hands stay relaxed on your chest; do not use them to push or pull your torso.
- Keep your lower back in contact with the floor throughout the set to avoid compensating with hip flexors.
- Control the lowering phase rather than dropping back down, which keeps tension on the obliques for longer.
Common mistakes
- Pulling on the neck or head, which shifts effort away from the obliques and can cause strain — keep hands on your chest, not behind your head.
- Rotating the torso instead of bending it sideways, which turns the exercise into a twist rather than a lateral crunch.
- Lifting the hips off the floor to generate momentum, reducing the demand on the target muscles.
- Using too large a range of motion and turning each rep into a full sit-up, which recruits the hip flexors and reduces oblique isolation.
- Holding your breath through the set — exhale as you crunch up to help brace the core and maintain rhythm.
Frequently asked questions
What muscles does the side crunch with hands on chest work?
The exercise primarily works the obliques — the muscles running along the sides of your torso — through lateral flexion. The rest of the core provides stability throughout the movement.
Why keep hands on the chest instead of behind the head?
Placing your hands on your chest prevents you from pulling on your neck, which is a common mistake when hands are interlocked behind the head. It keeps the effort where it belongs — on the obliques.
How is the side crunch different from a regular crunch?
A regular crunch involves forward flexion of the spine. The side crunch uses lateral flexion — bending sideways — which shifts the load from the rectus abdominis to the obliques on the working side.
How many reps should I do per side?
A typical starting point is 10–15 reps per side for 2–3 sets. Adjust based on your current core strength and how well you can maintain form through the set.
Can I do this exercise every day?
Most people recover adequately from bodyweight core exercises within 24 hours, so daily sessions are generally fine. If you feel soreness that has not cleared, give yourself a rest day before training that muscle again.
