Exercise guide
Sitting Swimmer On A Chair
- Beginner
- Compound
- Rep-based
- Back
- Shoulders
- Waist
This beginner-friendly compound movement improves spinal mobility and core stability by combining torso rotation with rhythmic arm reaches. It effectively activates the obliques and deltoids while promoting better posture through a seated position.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Sit upright on the edge of a sturdy chair with your feet flat on the floor, hip-width apart.
- Engage your core to maintain a tall, neutral spine without leaning against the backrest.
- Extend your arms out to the sides at shoulder height, palms facing down.
How to do it
- Rotate your torso to the right while reaching your left arm forward and pulling your right arm back in a fluid swimming motion.
- Exhale during the rotation, focusing on the twist coming from your waist.
- Inhale as you return to the center and immediately transition to the left side.
- Maintain a controlled, rhythmic tempo, ensuring your arms stay at shoulder level throughout.
Form checklist
- Keep your sit-bones firmly planted on the chair to isolate the rotation to the upper body.
- Avoid shrugging your shoulders; keep them depressed and away from your ears.
- Keep your chest lifted and avoid rounding your lower back.
- Follow the movement of your forward hand with your eyes to encourage full cervical rotation.
Pro tips
- Imagine you are moving through water to create internal resistance and increase muscle activation.
- Focus on the 'pulling' sensation in your back and the 'pushing' sensation in your chest to engage the pectorals and rear delts.
Make it harder
- Perform the movement while hovering your feet an inch off the ground to engage the lower abs.
- Hold a light dumbbell or a small water bottle in each hand to increase the load on the shoulders.
Frequently asked
- What muscles does the sitting swimmer on a chair work?
- The sitting swimmer on a chair primarily targets the abs, deltoids, lats, and obliques, and also works the erector spinae, serratus anterior, and trapezius as secondary muscles.
- What equipment do you need for the sitting swimmer on a chair?
- The sitting swimmer on a chair requires no equipment — just your body weight.
- Is the sitting swimmer on a chair good for beginners?
- Yes. The sitting swimmer on a chair is a beginner-friendly movement and a strong foundation to build on.
Related exercises
- Band Standing Single Arm Twist RowIntermediate · abs, lats, obliques, and trapezius
- Behind The Head Ball SlamIntermediate · abs, calves, lats, obliques, and pectorals
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- Cable Reverse WoodchopIntermediate · deltoids, lats, obliques, and serratus anterior