Fysiqal
Balance
Balance

Front Plank

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core-stabilityanti-extensionplankisometriclumbar-stabilityneuromotor

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Exercise demo
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Hold a straight-body position on forearms and toes, bracing so the spine does not sag — the archetypal isometric anti-extension core-stability hold.

Detail

Set the forearms on the floor (elbows under shoulders), legs extended, weight on forearms and toes. Brace the whole trunk (Abdominal Bracing (vs Hollowing)) and create a straight line from head to heels: ribs down, glutes (Gluteus Maximus) squeezed, pelvis neutral (slightly posterior to avoid arching), neck neutral (gaze at the floor just ahead). Hold while breathing shallowly behind the brace.

The plank trains anti-extension core stability (see Anti-Movement Core Training (Anti-Extension, Anti-Rotation, Anti-Lateral-Flexion)): gravity pulls the hips toward the floor, tending to extend/arch the lumbar spine, and the trunk musculature (Rectus Abdominis, Transverse Abdominis, obliques) must resist that and keep the spine neutral (see Spine Positioning — "S" Shape, Never "C").

Coaching:

  • The most common fault is the hips sagging (lumbar arch) — reset or stop the set when form breaks.
  • The second fault is hips piking up too high — keep the body in one line.
  • Quality time-under-tension with good position beats long sloppy holds.

Progressions (see Plank, Balance Training Progression): increase hold time → reduce base (lift one leg or one arm) → add a "body-saw" rock → elevate feet → place forearms on an unstable surface → progress to side plank (Side Plank) for anti-lateral-flexion. Regression: plank from the knees, or hands elevated on a bench.

Key facts

  • Forearm/toe hold, straight head-to-heel line, braced neutral spine.
  • Trains anti-extension core stability (isometric).
  • Faults: hips sagging (arch) or piking; stop the set when form breaks.
  • Progress: longer holds → lift a limb → body-saw → feet elevated → unstable surface → side plank. Regress: from knees or hands-elevated.

Connections

Sources

Cited in text — not yet linked
Authored from established core-stability consensus.

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Atlas Connections

Gluteus Maximus
The strongest, largest muscle in the body; the primary hip extensor and a lateral rotator of the femur.
Rectus Abdominis
The "abs"; a long strap-like trunk flexor split into left/right halves by the linea alba.
Transverse Abdominis
The deepest abdominal muscle; compresses the abdomen, supports the abdominal contents, and aids lower-back stability.
Anti-Movement Core Training (Anti-Extension, Anti-Rotation, Anti-Lateral-Flexion)Closely related
Train the core by resisting motion the limbs or a load try to impose — anti-extension, anti-rotation, and anti-lateral-flexion — rather than by repeatedly flexing the spine.
Balance Training Progression
Make balance harder by shrinking or destabilizing the base of support and removing sensory inputs — a staircase from two-feet stable to single-leg, eyes-closed, unstable-surface, and perturbation work.
Abdominal Bracing (vs Hollowing)Closely related
Stiffening the whole trunk wall — like bracing for a punch — to lock the spine in neutral and create a rigid base for the limbs to work from; the foundational core-stability skill.
Core Stability vs Core StrengthClosely related
Core strength is how much force the trunk muscles can produce; core stability is the trunk's ability to resist unwanted motion and keep the spine controlled — and for back health and force transfer, stability usually matters more.
Side PlankClosely related
Hold the body in a straight line on one forearm and the side of the feet, resisting the hips dropping — the key anti-lateral-flexion core-stability hold and a strong lateral-hip/oblique drill.
PlankClosely related
A straight-body isometric hold on the forearms and toes, bracing the whole core to keep the spine neutral — the foundational anti-extension core exercise.
Spine Positioning — "S" Shape, Never "C"
Stabilize the spine by holding it in a semi-isometric contraction so it keeps its natural "S" shape — never allow a "C"-shaped spine during exercise. This is a coaching cue for loaded lifting, not a literal, universal rule — see "Current nuance" below.