Plank

Diagram showing the start and finish positions of a plank exercise, highlighting muscles in the abdominal region.

Exercise Description

The Plank is a foundational isometric core exercise that develops abdominal strength, core stability, and muscular endurance. Unlike exercises that involve movement of the spine, the plank trains the core to resist movement and maintain a stable body position. This makes it highly effective for improving posture, spinal stability, athletic performance, and overall functional strength. Because it requires no equipment and can be modified for all fitness levels, the plank is one of the most widely used exercises in fitness, rehabilitation, and sports performance programs.

Primary Muscles Worked

  • Transverse Abdominis

  • Rectus Abdominis

Secondary Muscles Worked

  • External Obliques

  • Internal Obliques

  • Erector Spinae

  • Gluteus Maximus

  • Gluteus Medius

  • Quadriceps

  • Deltoids

  • Serratus Anterior

  • Pectoralis Major

  • Hip Stabilizers

How to Perform Correctly

Setup

  1. Lie face down on an exercise mat.

  2. Position your forearms on the floor with your elbows directly beneath your shoulders.

  3. Extend your legs behind you with your toes on the floor.

  4. Engage your core and glutes.

  5. Lift your body off the ground so that only your forearms and toes remain in contact with the floor.

  6. Form a straight line from your head to your heels.

Movement

  1. Maintain a neutral spine throughout the exercise.

  2. Keep your hips level and aligned with your shoulders.

  3. Tighten your abdominal muscles and glutes continuously.

  4. Keep your head in a neutral position and look toward the floor.

  5. Hold the position for the prescribed amount of time while maintaining proper posture.

Common Mistakes to Avoid

Allowing the Hips to Sag

  • Keep your core engaged and maintain a straight body line.

Raising the Hips Too High

  • Avoid turning the plank into an inverted “V” position.

Holding the Breath

  • Continue breathing normally while maintaining tension.

Looking Forward Excessively

  • Keep your neck neutral and your gaze directed toward the floor.

Rounding the Upper Back

  • Maintain a natural spinal alignment throughout the exercise.

Relaxing the Core

  • Actively brace your abdominal muscles for the duration of the hold.

Letting the Shoulders Shrug

  • Keep your shoulders stable and away from your ears.

Abs Exercises