Plank Jack

Instructions

1
Start in a plank position with hands shoulder-width apart, body in a straight line from head to heels, core engaged, and feet hip-width apart on the ground
2
Prepare by tightening your core, ensuring your shoulders are directly over your wrists, and maintaining a neutral spine with no sagging or hiking of hips
3
Lower your body by bringing your knees toward your chest while maintaining the plank position, allowing your hips to flex and knees to drive upward in a controlled manner
4
Return to full plank position by extending your legs back to the starting position, maintaining core tension throughout the movement and squeezing your abdominals at full extension
PRIMARY MUSCLESRectus Abdominis
SECONDARY MUSCLESObliques, Transverse Abdominis, Hip Flexors, Pectoralis Major
EQUIPMENTBody weight
DIFFICULTYIntermediate

Overview

Athletic trainers and bodybuilding coaches frequently recommend the Plank Jack 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 Plyometrics region.

Benefits

  • Allows for a natural movement path that closely mimics functional daily activities.
  • Promotes balanced muscular development by effectively recruiting the Rectus Abdominis and associated synergists.
  • Utilizes Body weight to create sustained mechanical tension, forcing deep muscle adaptation.
  • Significantly enhances the structural integrity and power of the Rectus Abdominis.

Common Mistakes

  • Rushing the repetition tempo instead of focusing on the mind-muscle connection with the Plyometrics.
  • Using excessive momentum to swing the Body weight rather than controlling the eccentric phase.
  • Failing to achieve a full range of motion, which drastically limits Rectus Abdominis engagement.

Muscle Anatomy

The primary driver is the Rectus Abdominis. However, the movement also recruits Obliques, Transverse Abdominis, Hip Flexors, Pectoralis Major to maintain control of the Body weight.

Exercise Variations

  • Dumbbell Plank Jack
  • Cable Plank Jack
  • Banded Plank Jack

Beginner Tips

If you are new to the Plank Jack , focus on mastering the movement pattern with zero weight before adding Body weight.

Frequently Asked Questions