Instructions

1

Lie flat on your back on a bench with legs extended or feet resting on the bench edge. Position your body so the bench supports your back and torso is off the bench edge for full range of motion.

2

Place hands behind your head with fingers interlaced but not pulling on the neck. Keep elbows out to the sides. Engage your core and prepare to lift your upper body toward your thighs.

3

Lower your upper body backward in a controlled manner, allowing your torso to extend and lengthen the abdominal muscles. Keep a slight bend in your knees and do not allow your back to hyperextend excessively.

4

Contract your abdominal muscles and pull your upper body forward and upward toward your knees, curling your spine. Bring your chest toward your thighs in a controlled crunching motion, then lower back to starting position.

PRIMARY MUSCLESRectus Abdominis

SECONDARY MUSCLESIliopsoas, Rectus Femoris, Obliques

EQUIPMENTBody weight

DIFFICULTYBeginner

Overview

Athletic trainers and bodybuilding coaches frequently recommend the Twist Sit-up because it challenges the Rectus Abdominis through a dynamic range of motion. By relying on Body weight, it reinforces proper movement patterns and builds robust strength in the Waist region.

Benefits

Acts as a highly scalable Strength movement, perfect for both beginners and elite athletes.
Reduces the likelihood of Waist injuries by reinforcing connective tissue strength.
Improves overall Waist stability and proprioception during heavy loads.

Common Mistakes

Using excessive momentum to swing the Body weight rather than controlling the eccentric phase.
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.

Pro Tips

Control the eccentric (lowering) phase of the Twist Sit-up for 3-4 seconds to drastically increase time under tension.

Muscle Anatomy

The primary driver is the Rectus Abdominis. However, the movement also recruits Iliopsoas, Rectus Femoris, Obliques to maintain control of the Body weight.

Beginner Tips

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

Twist Sit-up