Exercise guide
Seated Arm Crossover On A Chair
- Intermediate
- Isolation
- Rep-based
- Chest
- Shoulders
This beginner-friendly isolation exercise targets the pectoral muscles and anterior deltoids by utilizing horizontal adduction to improve chest activation and shoulder mobility.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Sit upright on a sturdy chair with your feet flat on the floor, hip-width apart.
- Extend your arms out to your sides at shoulder height, palms facing forward.
- Engage your core and maintain a tall spine, pulling your shoulder blades slightly back and down.
How to do it
- Exhale as you slowly bring your arms forward and across each other in front of your chest in a wide arc.
- Cross one arm over the other as far as comfortably possible, focusing on squeezing your chest muscles at the center.
- Inhale as you return your arms to the starting side position with a controlled, 2-second tempo.
- Alternate which arm crosses on top (e.g., right over left, then left over right) for each subsequent repetition.
Form checklist
- Keep your arms at shoulder height; do not let them drop toward your lap.
- Maintain a slight, soft bend in the elbows to protect the joints.
- Keep your torso stationary; avoid leaning forward or rounding your back as you cross.
- Ensure the movement is driven by the chest and shoulders, not by swinging the wrists.
Pro tips
- Focus on the 'mind-muscle connection' by visualizing your inner chest muscles pulling your upper arms together.
- Pause for one second at the point of maximum crossover to maximize the peak contraction of the pectorals.
Make it harder
- Perform the movement with a 4-second eccentric (opening) phase to increase time under tension.
- Hold small water bottles or light household objects to add slight external resistance.
Frequently asked
- What muscles does the seated arm crossover on a chair work?
- The seated arm crossover on a chair primarily targets the deltoids and pectorals, and also works the serratus anterior and trapezius as secondary muscles.
- What equipment do you need for the seated arm crossover on a chair?
- The seated arm crossover on a chair requires no equipment — just your body weight.
- Is the seated arm crossover on a chair good for beginners?
- The seated arm crossover on a chair is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.