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Plank Hold Test (Core Endurance)

Evidence-grounded — sourced from Fysiqal's fitness knowledge graph· 1 min read
muscular-enduranceplankcoreisometrictesttrunk-stability

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Hold a forearm plank with a neutral spine for as long as possible; the time to failure rates isometric core/trunk endurance with minimal spinal loading.

Detail

The plank hold test measures isometric core (trunk) muscular endurance — anterior core, plus stabilizers. It is popular because it loads the spine less than dynamic flexion tests and needs no equipment.

Protocol: assume a prone forearm plank — elbows under shoulders, forearms on the floor, body in a straight line from head to heels, toes on the floor, neutral spine (no sagging or piking). Start the clock; hold until the participant can no longer maintain neutral alignment (hips drop/rise, or they stop). Record the time in seconds.

Reference (general guidance, not a single official table): a ~60 s hold is a common "good" benchmark for general-fitness adults; well-conditioned individuals exceed 2 minutes. McGill's side-plank and flexor/extensor endurance holds use their own norms and ratios for assessing trunk-muscle balance. Standardize cueing and the failure criterion for valid re-tests.

Key facts

  • Measures isometric core/trunk endurance; low spinal load, no equipment.
  • Forearm plank, neutral spine; time held until alignment fails (seconds).
  • Common "good" general-fitness benchmark ~60 s; well-trained >2 min (guidance, not a fixed norm).
  • McGill trunk-endurance battery (front/side/extensor) uses separate norms and ratios.
  • Keep cueing and failure criteria constant for re-tests.

Connections

  • curl-up-test — dynamic core-endurance counterpart.
  • push-up-test — companion endurance test.
  • muscular-endurance-norms — interpretation context.
  • plank — the exercise itself.
SourceCurrent guideline bodies
ACSM's Guidelines for Exercise Testing and Prescription (10th/11th ed.); McGill, Low Back Disorders (trunk endurance tests). Plank time benchmarks are general guidance.
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Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.

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Atlas Connections

Abdominals (Midsection)
Four muscles — rectus abdominis, external oblique, internal oblique, transverse abdominis — that flex, rotate, and laterally flex the trunk and compress the abdomen.
Rectus Abdominis
The "abs"; a long strap-like trunk flexor split into left/right halves by the linea alba.
Curl-Up (Crunch) TestClosely related
Cadence-paced partial sit-ups (curl-ups) done in time with a metronome until you can't keep pace or hit a cap; the count rates abdominal/core endurance and avoids the hip-flexor-loaded full sit-up.
Muscular Endurance Norms (Push-Up / Curl-Up)
Age- and sex-specific reference tables turn a raw push-up or curl-up count into a category (needs improvement → excellent); counts decline with age and differ by sex/protocol.
Push-Up Test (Muscular Endurance)Closely related
Do as many consecutive good-form push-ups as possible (men on toes, women on knees per the ACSM protocol); the count rates upper-body muscular endurance against age/sex norms.
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.