Knee Touch Crunch

Instructions

1
Lie supine on the floor or exercise mat with knees bent, feet flat on the ground positioned hip-width apart. Place hands behind the head with elbows flared outward, or across the chest. Maintain neutral spine alignment with lower back slightly pressed to floor.
2
Engage core musculature by drawing navel toward spine. Ensure feet remain in contact with floor throughout movement. Position head in neutral alignment with gaze directed upward at approximately 45 degrees.
3
Lower the torso eccentrically by allowing the torso to extend backward, lengthening the rectus abdominis. Control the descent without allowing lower back to excessively arch. Maintain engaged core throughout the lowering phase.
4
Contract the rectus abdominis concentrically by flexing the lumbar spine and lifting the torso upward toward the thighs. Drive the movement through abdominal contraction rather than pulling with the neck. Return to starting position with controlled tempo, stopping just short of complete relaxation at bottom position.
PRIMARY MUSCLESRectus Abdominis
SECONDARY MUSCLESObliquus Externus Abdominis, Obliquus Internus Abdominis, Transversus Abdominis, Iliopsoas
EQUIPMENTBody weight
DIFFICULTYBeginner

Overview

Athletic trainers and bodybuilding coaches frequently recommend the Knee Touch Crunch 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

  • Significantly enhances the structural integrity and power of the Rectus Abdominis.
  • Utilizes Body weight to create sustained mechanical tension, forcing deep muscle adaptation.
  • Promotes balanced muscular development by effectively recruiting the Rectus Abdominis and associated synergists.
  • Improves overall Waist stability and proprioception during heavy loads.

Common Mistakes

  • Shrugging the shoulders or compensating with secondary muscles rather than isolating the Rectus Abdominis.
  • Rushing the repetition tempo instead of focusing on the mind-muscle connection with the Waist.
  • Using excessive momentum to swing the Body weight rather than controlling the eccentric phase.

Muscle Anatomy

The primary driver is the Rectus Abdominis. However, the movement also recruits Obliquus Externus Abdominis, Obliquus Internus Abdominis, Transversus Abdominis, Iliopsoas to maintain control of the Body weight.

Beginner Tips

If you are new to the Knee Touch Crunch, focus on mastering the movement pattern with zero weight before adding Body weight.

Frequently Asked Questions