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Plank

A foundational isometric hold that builds core stability without a single rep of movement.

Setup

Set up on your forearms and toes. Elbows directly under your shoulders, body forming a straight line from head to heels.

Movement

Brace your core. Imagine bracing for a light punch to the stomach — that tension is what stabilizes the position. Keep your hips level. Don't let your hips sag toward the floor or pike up toward the ceiling.

Return

Breathe normally while holding. Holding your breath adds unnecessary tension elsewhere — breathe steadily throughout the hold.

Common Mistake to Avoid

Letting the hips sag. A sagging midsection means the core isn't actually doing the stabilizing work the exercise is meant to train.

Equipment None (bodyweight)
Primary Muscles Abs (rectus abdominis, transverse abdominis)
Secondary Muscles Shoulders, glutes

Why it matters

Unlike a crunch, the plank trains the core's ability to resist movement rather than create it — which is closer to how the core actually functions in real life, stabilizing your spine while your arms and legs do the moving. Building that kind of stability is foundational before adding more dynamic ab work on top of it.

How to do it

  1. Set up on your forearms and toes. Elbows directly under your shoulders, body forming a straight line from head to heels.
  2. Brace your core. Imagine bracing for a light punch to the stomach — that tension is what stabilizes the position.
  3. Keep your hips level. Don't let your hips sag toward the floor or pike up toward the ceiling.
  4. Breathe normally while holding. Holding your breath adds unnecessary tension elsewhere — breathe steadily throughout the hold.

Common mistakes

  • Letting the hips sag. A sagging midsection means the core isn't actually doing the stabilizing work the exercise is meant to train.
  • Piking the hips up too high. Going too far the other direction reduces the core engagement just as much as sagging does.
  • Holding the breath. Tensing up and holding your breath doesn't add stability — it just adds unnecessary strain.
  • Chasing longer hold times over good form. A shorter hold with a perfectly straight body line is more valuable than a longer hold with sagging hips.

Sets & reps by level

Beginner

3 sets of 20–30 second holds, prioritizing a straight body line over duration.

Intermediate

3–4 sets of 45–60 second holds.

Advanced

3–4 sets of 60–90+ second holds, or add difficulty with a weighted plate on the back or a more unstable surface.

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