How many calories does strength training burn?

A strength session usually burns a few cals a minute once the rests are in the total. A critical review of lab workouts put the published rates at about 2.7 to 11 cals a minute in men and about 2.3 to 5.2 in women. Read the review. In one head-to-head study, nine men averaging 87 kg used 8.8 cals a minute during a dense 30-minute weight workout, close to their treadmill and bike sessions of the same length. Read that study. A different lifting protocol, four exercises and two sets, averaged 141 cals in 34 minutes on a metabolic cart, about 4.1 cals a minute. Read that comparison.

The papers say kilocalories. That is the calorie on a food label. This page writes it as cals.

The burn after you rack the bar is smaller than the session in the studies that measured it. A review of 16 trials found about 4 to 114 extra cals, lasting anywhere from 5 minutes to 15 hours. Read the review. A long tail can still be a small pile of cals.

Keep the lifting. Price the food from maintenance and the weekly rate you actually want. If that target was already built with your training in it, leave the meals alone and read the scale over two or three weeks. A watch total of 400 or 600 cals is a weak basis for a meal.

If maintenance is still a guess, start with the TDEE calculator. If you already have a weekly rate of loss in mind, the calorie deficit calculator turns that rate into a starting gap. The cutting playbook is where the lifting stays in the plan while fat comes off.

What to do with the number

Same people, four half hours

One study holds the people and the duration still.

Falcone and colleagues had nine recreationally active men, mean age 25, mean weight 86.6 kg (SD 7.5), do four sessions of about 30 minutes. Weights were six exercises, three sets of 10 at 75 percent of one-rep max, with 60 seconds between sets. The treadmill and the bike were held near 70 percent of max heart rate. The fourth session was hydraulic intervals: 20 seconds hard, 40 seconds off. Calories came from oxygen and carbon dioxide during the session, converted from carbohydrate and fat use. The paper leaves resting metabolism in that total.

Same nine men, about 30 minutes

WeightsTreadmillCyclingHydraulic intervals

The weight workout averaged 8.83 cals a minute (SD 1.55). The treadmill was 9.48 (SD 1.30), the bike 9.23 (SD 1.25), and the hydraulic intervals 12.62 (SD 2.36). The paper published the rate. Times 30 minutes, the weight session is about 265 cals.

Using the compendium definition below, 8.83 cals a minute at 86.6 kg is about 6.1 METs (8.83 × 60 / 86.6). That sits on the vigorous lifting code, 6.0 METs. Their treadmill rate is about 6.6 METs. In this specific comparison, a dense weight half hour and a moderate treadmill half hour were close. The hydraulic session was the one that pulled away.

Nine young men, one lab, verbal encouragement, and a weight workout with short rests. A session built from five heavy lifts and three-minute rests is a different animal. The standard deviations are wide enough that two men in the same protocol differed by more than a cal a minute.

Why two lifting labs disagree

Reis and colleagues went through the measurement problem in 2011 and compiled session rates of about 2.7 to 11 cals a minute in men and about 2.3 to 5.2 in women. Rest length, load, exercise choice, and sex all moved the number. Rates near 30 cals a minute show up in that literature when the clock is on the set, especially a big exercise. A set lasts seconds. An hour in the gym is mostly the time between sets. Thirty cals a minute, stretched across a full hour, is 1,800 cals. The hour was never at that rate.

A 2024 scoping review of 166 studies found the same spread for a methodological reason. Multi-exercise protocols reported about 6 to 62 kilojoules a minute, roughly 1.4 to 15 cals, using 4.184 kilojoules per cal. Some papers timed the sets only. Some included the rests. Some added the recovery period after the workout. Only 34 of the 166 subtracted resting metabolism. Read the review.

Oxygen readings also miss part of a hard set. The same review describes single sets of bench press to failure at 70 percent of one-rep max: about 26.5 kJ from glycolysis and 4.9 kJ from oxygen, roughly 6 cals and 1 cal. With long rests, some of that oxygen cost shows up in the breaths between sets. No single correction factor repairs every cart printout. The scoping review's point is that the method changes the total, so two careful papers can still disagree.

A 2026 lab comparison is the low, rest-heavy end. Sixty-two lean men (BMI at or below 25) did two sets each of bench press, squat, T-bar row, and deadlift at a 10-rep max. The protocol lasted 34 minutes. The metabolic cart averaged 140.79 cals, about 4.1 cals a minute. The Apple Watch in that study averaged 299.10. How far watches miss is the device article. For the burn itself, the cart is the number to keep: about 141 cals, in lean men, with a lot of the 34 minutes spent between sets. The paper reports BMI and leaves body weight out, so the 4.1 stays in cals a minute.

Short rests and a lot of work in half an hour, in men near 87 kg, landed near 9 cals a minute. Fewer sets and more standing around landed near 4. Both protocols are strength training.

A coding table, scaled to two body weights

The 2024 Adult Compendium assigns standard METs so questionnaires can be scored the same way across studies. One MET is a standardized resting rate of 3.5 milliliters of oxygen per kilogram per minute, about 1 cal per kilogram per hour. Gross cals for a block of time are MET × kilograms × hours. The authors are explicit that this is a poor personal measurement. People differ, and the table was built for research coding. Read the update. The activity rows are listed on the Compendium site.

Two rows cover most gym sessions:

• 3.5 METs: multiple exercises, 8 to 15 reps, varied resistance (code 02054).
• 6.0 METs: vigorous free-weight or machine work, including powerlifting and bodybuilding (code 02050).

A circuit with short rests and paired supersets is 5.8 METs (code 02055), close to the vigorous row.

One hour, gross calories

3.5 MET, ordinary multi-exercise work6.0 MET, vigorous lifting

The gross hour includes the cals you would have used sitting down. At these weights that resting hour is 60 or 90 cals. The extra from the session is what is left after subtracting one MET.

If a rate of 2.3 to 5.2 cals a minute held for an hour, that would be about 140 to 310 cals. The 60 kg compendium hours, 210 and 360 gross, overlap the women's lab band and then run past the top of it at the vigorous code. If a men's rate of 2.7 to 11 cals a minute held for an hour, that would be about 160 to 660 cals. Both compendium hours for a 90 kg lifter sit inside that band. Use the codes as a planning range.

A week of lifting, priced two ways

Take an 80 kg lifter and four 60-minute sessions. This block is the compendium arithmetic above, repeated. Nobody was measured for this week.

At 3.5 METs each session is 280 gross cals, 200 above the resting hour. Four sessions are 800 cals above rest for the week, about 114 cals a day if you spread them across seven days.

At 6.0 METs each session is 480 gross, 400 above rest. Four sessions are 1,600 above rest, about 229 cals a day.

The code you pick moves the week by about 115 cals a day. That gap is the uncertainty inside the table, before a watch gets involved. A planned deficit of 400 or 500 cals a day is larger than either daily average. How large that deficit should be is a rate decision. The lifting total sits beside it.

Eating a 450-cal watch credit after each of the four sessions adds 1,800 cals in the week, about 257 a day, on top of a target that may already contain the training. Why TDEE calculators disagree is mostly this accounting. A formula set to "moderately active" has already charged you for gym days. A formula set to sedentary has not. Eating the workout back walks through which of those you built.

One more leak sits outside the session. People often walk less on days they train hard, and a deficit itself can cut fidgeting and steps. Why expenditure falls during a diet separates that drop from the workout. The week you can see, intake and trend weight together, already includes the lifting, the walks you skipped, and the rests.

The afterburn is a small second line

Excess post-exercise oxygen consumption is the extra oxygen used while you recover. Farinatti, Castinheiras Neto, and da Silva reviewed 16 resistance-training studies, 155 adults, 54 percent of them men, with group mean ages from about 20 to about 34. Reported extras ran from 4.1 cals to 114 cals. The shortest observation that still counted was 5 minutes. The longest was 900 minutes, which is 15 hours. Volume tended to raise both the size and the length of that extra. Load tended to raise the size. Short rests raised the afterburn and, in the authors' reading, did not raise the energy cost of the whole bout.

Haltom and colleagues are the clear pair inside that review. Two circuits of eight exercises, 20 reps at 75 percent of a 20-rep max, rests of either 20 or 60 seconds. The one-hour afterburn was 51.5 cals with the short rests and 37.0 cals with the longer ones. Exercise plus that hour of recovery went the other way: 242 cals with 20-second rests, 277 cals with 60-second rests. The longer workout simply contained more work. Chasing the afterburn by shortening every rest can shrink the session it follows.

A 250-cal session plus the largest extra in that review, 114 cals, is still well short of a doubled workout. That 114 sits on a long observation window, in a literature the reviewers called hard to compare. Plan on a second line of tens of cals. The food log is where you would see it if it mattered.

What people do with the watch number

In an August 2026 r/loseit thread, a lifter finished a 75-minute push session and saw 473 active cals and 574 total on the watch. The thread is here. When it was reviewed on November 13, 2026, the top comment (scored 12) treated the screen as a ballpark and guessed the real burn was lower by some fraction the commenter did not measure. A comment scored 10 said a food-target calculator may already have included the session, so the watch is a curiosity. A comment scored 6 said the reason to lift is muscle, and that walking around the gym can rival the sets. Those are anecdotes. The 473 and 574 are what the watch displayed.

A November 2025 r/loseit thread is the same argument at a higher body weight. The poster was 123 kg, trained about 70 minutes, and saw about 650 cals. The thread is here. The top comment (scored 9 at the same review) doubted a heart-rate model for machines and free weights. A comment scored 3, from a lighter lifter training without a watch, put a 90-minute session near 300 cals and checked that guess against the weekly deficit. The check that settles a personal number is intake against the trend.

For a 123 kg lifter, the vigorous compendium hour is 6.0 × 123 = 738 gross cals, and the ordinary code is 3.5 × 123 = 430.5. Seventy minutes at those codes is about 860 and 500 gross cals. A 650-cal screen can sit inside the table and still be the wrong number for that session, because the code is a guess about rest and effort. The cart study is the reason to stay suspicious when the screen is the only evidence. Whether active calories change a Zolt target is a separate page. The target follows logged intake and the weight trend. How that estimate is built is the product page.

How to use this week

1. Write down the session you actually do: minutes, roughly how long you rest, and whether the exercises are squats and rows or a circuit.
2. Pick a planning band from the table, gross and above rest, at your weight. Use 3.5 METs when the rests are long. Use 6.0 when the rests are short and the work is large. Hold both numbers. The gap between them is the uncertainty.
3. Check whether your current calorie target was built with those gym days already inside it.
4. Keep food at that target for two or three weeks of complete logs and comparable weigh-ins.
5. Change food when the trend and your training disagree with the plan. The disagreement is those two, read together.

If the trend has been flat for two or three consistent weeks, the lifting total is one item on a longer list. A stall in a deficit starts with the log and the maintenance estimate. Checking a TDEE estimate is the order of operations.

Strength work still belongs in the week when the calorie line is modest. The cutting playbook keeps meaningful loads in the program and uses steps when you want a controlled bump in expenditure. Cardio for heart health is the separate case for lifters who need a cardiovascular baseline beside the lifting.

Get care, and ease off a harsh deficit, if you are fainting, losing menstrual periods, picking up repeated injury, or if rules about food are getting rigid. A watch credit is the wrong fix for those.

Common questions

How many calories does a one-hour lift burn?

Use a range. At 3.5 METs, one hour is 210 gross cals at 60 kg and 315 at 90 kg, including about 60 or 90 cals you would have used at rest. At 6.0 METs those hours are 360 and 540 gross. Lab sessions in men have fallen around 2.7 to 11 cals a minute, which is about 160 to 660 cals if a rate like that held for an hour. Match the code to the rests. A five-lift session with long rests belongs at the low end.

Does the afterburn double a lifting workout?

The measured extras in a 16-study review ran from about 4 cals to 114 cals. In one circuit comparison, shorter rests raised the one-hour afterburn from 37 cals to 52 cals, and the session plus that hour was still smaller because the work bout was shorter. Plan on a second line of tens of cals.

Should you eat back strength-training calories?

Eat to the weekly target. Add food when the rate of loss is faster than you planned or when training is falling apart. Skip the habit of matching the watch after a session that the target already assumed. The eat-back article is the full version of that choice.

Why does a watch show 400 to 600 cals for lifting?

Heart rate rises during a hard set and stays up while you rest, and a calorie model can treat that like steady work. In the 34-minute lab session, the cart averaged 141 cals and the Apple Watch averaged 299. Screens near 450 to 650 show up constantly in lifting threads. Treat them as a record that you trained. Price the week from intake and the scale.

Do heavier people burn more while lifting?

The compendium scales in proportion to body weight, so the same MET and the same hour produce more cals at 90 kg than at 60 kg. Lab rates in women have also been compiled lower than rates in men, around 2.3 to 5.2 cals a minute against 2.7 to 11. Body size is one reason. The workout you did is the other. A heavier person doing long-rest singles can still land under a lighter person doing a dense circuit.