Exercise Technique
How to Plank: Build Trunk Endurance With Good Position
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.
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.
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.
Programming and progression
Begin with 2–3 sets of 8–12 controlled repetitions, leaving two or three good repetitions in reserve. Add repetitions before load. When every set reaches the top of the range twice with stable technique, use the smallest practical load increase.
Exercise discomfort is not a requirement. Stop for sharp pain, dizziness, chest pressure, or unusual shortness of breath, and seek qualified care for persistent symptoms.
Research sources
EMG findings describe acute activation and should not be interpreted as proof that the most activating variation is best for every goal.
Editorial basis and sources
This guide applies established resistance-training principles and conservative exercise coaching practices. General activity context is informed by 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.