Extended Plank

The Extended Plank is an advanced isometric core exercise that intensifies the standard plank by lengthening the lever arm between your shoulders and feet. By placing your hands further forward than your shoulders, it significantly increases the demand on the deep abdominals and anterior deltoids to prevent the lower back from arching.

Exercise movement reviewed by:Marie Braga, PT, DPT, CSCS
How Iridium Programs This

Iridium schedules this high-leverage isometric only when your anterior delts and spinal erectors show sufficient recovery status to support the increased stability demands. The AI tracks your performance relative to body weight, using RPE trends to dictate hold duration rather than arbitrary time goals. If your recent history indicates heavy overhead pressing, Iridium may rotate in core exercises less dependent on shoulder stability to ensure the target muscles remain the limiting factor.

Form Cues

Do
  • Start in a high plank position and walk your hands forward past your shoulders
  • Tuck your tailbone slightly to engage your glutes
  • Brace your core tightly as if preparing for a punch
  • Drive your palms firmly into the floor to stabilize your shoulders
  • Keep your gaze on the floor to maintain a neutral neck
Don't
  • Don't let your hips sag toward the floor
  • Don't arch your lower back at any point
  • Don't shrug your shoulders up toward your ears
  • Don't reach further forward than you can control with perfect form
  • Don't hold your breath; take controlled, shallow breaths

Common Mistakes

  • Hyperextending the lower back
  • Reaching too far forward too soon
  • Looking forward instead of down
  • Disengaging the glutes
  • Allowing the ribcage to flare open

Muscles Worked

This exercise primarily targets the Rectus Abdominis and Transverse Abdominis, forcing them to work overtime to resist spinal extension due to the lengthened lever arm. It also heavily recruits the Anterior Deltoids and Lats to stabilize the shoulder girdle, while the Glutes work to maintain proper pelvic alignment.

Primary

General Core

Secondary

Anterior DeltoidErector Spinae

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