How Many Calories Are Burned In A 5-Minute Plank? | Fast Math

Calories Burned During A Five-Minute Plank: What Changes The Number

Energy use comes from two levers: how hard you brace and how much mass you hold up. The math uses MET values, where 1 MET equals about 1 kcal per kilogram per hour. A tougher brace scores a higher MET, so the same person burns more per minute when tension rises.

Researchers catalog activities by MET to make estimates possible. In that catalog, a light abdominal hold that includes a plank variant sits near 2.8 MET, a steady body-weight session lands around 3.8 MET, and a hard calisthenics block sits higher near 7.5 MET. Those values come from the Adult Compendium and let you convert time into calories with a simple equation: MET × body weight (kg) × time (hours). See the Compendium’s definitions and bands for context (1 MET = 1 kcal/kg/hour; light <3, moderate 3.0–5.9, vigorous ≥6.0 on the intensity scale).

Estimated Calories For A 5-Minute Hold (By Weight & Effort)

Body Weight	Steady Hold (3.8 MET)	Hard Hold (7.5 MET)
57 kg (125 lb)	18 kcal	35.6 kcal
70 kg (155 lb)	22.2 kcal	43.8 kcal
84 kg (185 lb)	26.6 kcal	52.5 kcal

Those numbers assume either a steady brace or a very hard brace. A gentle setup lands lower near 2.8 MET; at 70 kg that’s ~16 kcal across five minutes. The Compendium groups movements by effort, listing plank under light calisthenics, while advanced holds align with the broader calisthenics entries that carry higher METs.

You’ll get a tighter estimate when you pair the math with food logs and training notes. Once you set your daily calorie needs, this number slots into your plan without guesswork.

How To Do The Math For Your Body

Grab Your MET, Weight, And Time

Pick a MET that matches your effort: 2.8 for a relaxed stance, about 3.8 for a crisp brace, and a higher band only for long-lever, RKC, or loaded work. Convert weight to kilograms, choose hold time, then multiply: MET × kg × hours. Texas A&M’s extension gives the same formula and a plain-language explainer of METs (METs & calories equation).

Quick Worked Example

Say you weigh 70 kg and hold a steady five-minute set. Using 3.8 MET, the calculation is 3.8 × 70 × 0.083 h ≈ 22 calories. That same person using a long-lever style could near 35–44 calories if intensity matches the higher band.

Form First: Build Safe Tension

Set Up

Plant forearms under shoulders. Press the floor away. Stack ribs over pelvis, glutes tight, quads braced. Keep a long line from head to heels. Breathe behind the brace—short nasal inhales and smooth exhales.

Hold Standards

End the set when any of these show up: hips sag, lower back pinches, shoulders creep toward ears, or breath turns choppy. Quality beats a round number on the clock.

Scale Up Or Down

Drop to knees for easier work. Step feet wider for stability. For more challenge, move to a long-lever setup (elbows a bit forward), add a light plate on the mid-back, or pulse gentle posterior tilt for short bursts.

What Drives A Higher Or Lower Burn

Body Weight

Heavier bodies spend more energy holding position. That’s why the estimates rise from 57 to 84 kg in the table.

Total Tension

Think of the plank as a whole-body isometric. More tension across lats, glutes, and quads pushes the cost per minute up.

Variation Choice

A basic forearm stance sits in the low band. The long-lever or RKC style climbs higher. Unstable surfaces and arm reaches nudge the number up, but only if form stays clean.

Make Planks Work Inside A Week

Use short, high-quality sets rather than one marathon hold. Two to four rounds of 20–60 seconds with full-body tension pair well with lifting or steady cardio. Layer in walking, cycling, or rower time for the larger calorie share. Harvard’s long-running chart shows why: a half hour of moderate body-weight work lands around 135–189 calories for 125–185 lb adults, while aerobic blocks push higher (Harvard calorie table).

Sample Core Block

Cycle planks with side planks and dead bugs. Keep breathing steady and avoid breath holds. Finish with a short walk to cool down.

Time Benchmarks And Mix-And-Match Sets

Use these numbers as a planning aid. They’re estimates, not lab tests. Track how sets feel and adjust the effort band before chasing time.

Calories By Duration At 70 kg (Steady Vs. Hard)

Duration	Steady Hold	Hard Hold
1 minute	4.4 kcal	8.8 kcal
3 minutes	13.3 kcal	26.2 kcal
5 minutes	22.2 kcal	43.8 kcal

Troubleshooting: Common Form Slips

Hip Drop

Shift weight toward toes and grip the floor. Squeeze glutes and tuck a touch. If the drop returns, end the set.

Shoulder Shrug

Push the ground away and widen the upper back. Bring elbows slightly forward to spread the load.

Breath Holds

Keep a quiet exhale rhythm. Small sips of air help you keep tension without straining your neck.

Where These Numbers Come From

The Adult Compendium defines METs and lists activity codes used for calorie math. It also outlines the intensity bands used in public guidance: light below 3 MET, moderate from 3.0 to 5.9, vigorous at 6.0 or higher. Those bands match how a basic forearm stance feels compared with long-lever or loaded work.

Want a fuller walkthrough of energy balance for weight change? Try our calorie deficit guide.