Exercise Technique

How to Plank: Build Trunk Endurance With Good Position

By Raouf Rouissa · Updated October 21, 2026 · 3 min read

The plank is an isometric trunk exercise: the body resists extension while the forearms and feet support it. Longer is not always better. A shorter, well-braced hold is more useful than a long hold maintained by sagging through the lower back.

Safety note: This article provides general exercise education, not medical advice. Stop if you experience sharp pain, dizziness, chest pressure, or unusual shortness of breath.

At a glance

Forearm plank

Starting example: 2–3 holds of 15–30 seconds
Progression options: Elevated or knees-down → full plank → longer lever
Finish the set: Before position or control changes; stop for pain or concerning symptoms.

Adjust to your ability. These are general examples, not a fitness assessment.

In this guide

Build the position Movement reference Breathe while braced Choose the right level Dose the exercise Your first practice session A decision during your set Choose the next step Does shaking mean the hold is effective?Research sources

Build the position

Place the elbows under the shoulders and forearms on the floor. Step the feet back and form a line from head to heels. Lightly squeeze the glutes and bring the ribs toward the pelvis without rounding aggressively.

Movement reference

Forearm plank: support the elbows below the shoulders and keep breathing. — Form First schematic illustration. A movement concept, not an anatomical measurement or a universal body position.

Breathe while braced

Create abdominal tension as if preparing for a cough, then continue taking small controlled breaths. Holding the breath for the entire set can cause lightheadedness and is unnecessary for general trunk-endurance training.

Choose the right level

Elevate the forearms on a bench or place the knees on the floor for an easier version. Progress by lowering the support, extending the lever, or adding controlled limb movement—not merely chasing several-minute holds.

Dose the exercise

Use 2–4 sets of 15–45 seconds and stop before position changes substantially. Rest 45–90 seconds. If you can easily exceed the range, choose a harder but controllable variation.

Your first practice session

Use an elevated forearm support or knees-down version if you cannot hold position while breathing.

Suggested starting dose: 2–3 holds of 15–30 seconds. Treat this as a starting example for a generally healthy beginner, not an individual prescription. Rest until you can repeat the movement with control, and finish before technique breaks down.

A decision during your set

If your position changes at 18 seconds, record 18 seconds. Rest, then use an easier version rather than extending a sagging hold.

Record seconds and variation, not repetitions. Add a few controlled seconds before choosing a harder variation.

Choose the next step

Elevated or knees-down → full plank → longer lever. Stay at the current step until your repetitions or holds are repeatable. Progression is optional on a tired day; using an easier version can keep practice consistent.

Does shaking mean the hold is effective?

Shaking can accompany effort, but it is not a score or a target. Continue only while you can breathe and hold a repeatable position. An easier version with control is more useful than extending a failing hold.

Research sources

Traditional and long-lever plank EMG comparison.

EMG findings describe acute activation and should not be interpreted as proof that the most activating variation is best for every goal.

Put this guide into practice

Keep a record of your exercise version, load, repetitions or hold time, and one technique observation.

Open your workout log

Continue learning: how to progress · choosing rest periods · plan your week.

Sources and limitations

The practice examples on this page are educational suggestions, not results from a supervised trial or an assessment of your movement. Public-health context comes from the U.S. Department of Health and Human Services’ Physical Activity Guidelines for Americans and the CDC’s physical activity guidance. See our editorial policy for how we research, write, review, and update content.