Sit-up with Arms on Chest

Instructions

1
Lie supine on your back with knees bent and feet flat on the floor, positioned hip-width apart. Place hands behind your head with elbows pointing outward or across your chest. Maintain neutral spine with lower back in contact with the floor.
2
Engage your core by drawing your navel toward your spine. Keep your neck neutral and avoid pulling on your head. Ensure your lower back remains pressed against the floor throughout the movement.
3
Slowly lower your torso back toward the starting position by releasing tension through the abdominal muscles. Control the descent and avoid relaxing completely between repetitions to maintain constant tension on the rectus abdominis.
4
Contract your abdominal muscles to curl your torso forward, lifting your shoulder blades off the floor. Continue the crunch motion until you feel maximum contraction in the upper abs. Return to starting position with control.
PRIMARY MUSCLESRectus Abdominis
SECONDARY MUSCLESIliopsoas, Rectus Femoris, Serratus Anterior, Transverse Abdominis
EQUIPMENTBody weight
DIFFICULTYBeginner

Overview

If you want to isolate and overload the Rectus Abdominis, the Sit-up with Arms on Chest is an excellent addition to your routine. The mechanics of this Strength exercise specifically bias the Waist, while the use of Body weight allows for a smooth, natural resistance curve.

Benefits

  • Acts as a highly scalable Strength movement, perfect for both beginners and elite athletes.
  • Promotes balanced muscular development by effectively recruiting the Rectus Abdominis and associated synergists.
  • Allows for a natural movement path that closely mimics functional daily activities.
  • Improves overall Waist stability and proprioception during heavy loads.
  • Reduces the likelihood of Waist injuries by reinforcing connective tissue strength.

Common Mistakes

  • Losing core tension, leading to poor spinal alignment and reduced power output.
  • Rushing the repetition tempo instead of focusing on the mind-muscle connection with the Waist.
  • Failing to achieve a full range of motion, which drastically limits Rectus Abdominis engagement.

Pro Tips

To maximize the Sit-up with Arms on Chest, actively squeeze the Rectus Abdominis at the peak of the contraction for a full second.

Exercise Variations

  • Dumbbell Sit-up with Arms on Chest
  • Cable Sit-up with Arms on Chest
  • Banded Sit-up with Arms on Chest

Beginner Tips

If you are new to the Sit-up with Arms on Chest, focus on mastering the movement pattern with zero weight before adding Body weight.

Frequently Asked Questions