How Many Calories Does Strength & Conditioning Burn?

Strength & Conditioning calories by weight & duration

The ~457 calories per hour figure is an estimate for a 155-pound person using a MET of 6.5, and your actual number will shift based on your weight, how hard you push, and how much rest the session includes. Logging your sessions in the Mariposas app lets you track burn over time so you can see how your output changes as your fitness builds.

Calculated as MET (6.5) × body weight (kg) × hours. How this works.

What to expect in a strength & conditioning class

Most S&C classes open with a structured warm-up that primes the joints and activates the posterior chain, think banded hip work, thoracic rotations, and a light barbell warm-up set or two, before the real loading begins. The working portion typically alternates between a compound lift (a squat, deadlift, press, or pull variation) and a conditioning block, often something like kettlebell swings, box step-ups, rowing intervals, or sled pushes, with rest built in between rounds rather than between every set. Expect the class to have a clear structure on the whiteboard or screen before you walk in, with scaled weight options called out so you can find an appropriate load without trial and error mid-session. By the final conditioning finisher, most people are moving slower than they planned to.

Tips for your first strength & conditioning class

• Pick a load you can move with full range of motion for the last rep of a set, not just the first. A bar that feels light in rep one often feels very different by rep six when paired with a conditioning block that came before it.
• Learn the difference between fatigue-form breakdown and appropriate difficulty. A little shakiness at the end of a hard set is normal. Your lower back rounding on a deadlift because the weight is too heavy is a signal to drop the load, not push through.
• Arrive a few minutes early and tell the coach it's your first class. Most S&C coaches will give you a quick rundown of how loads are organized and which scaling option makes sense as a starting point.
• Prioritize the barbell warm-up sets even if they feel trivially easy. They are when the movement pattern gets grooved, and skipping them to look stronger in the working sets is a trade that almost always backfires.

What affects how many calories strength & conditioning burns

The 457 calorie-per-hour figure is calculated for a 155-pound person, and it scales meaningfully with body weight, so a heavier person doing the same session will burn more and a lighter person will burn less. Effort level matters just as much: someone who moves at tempo, keeps rest short, and lifts close to their working capacity will see a noticeably higher burn than someone who takes long breaks or uses a conservative load on every movement. Interval-style conditioning blocks push the number up relative to steady-state strength work, so sessions that include repeated short sprints or dense circuit rounds will typically sit at the higher end of the range.

Three things move your number most: body weight (a heavier body burns more for the same activity, that's why the table runs from 125 to 225 lb), duration (calories scale with time), and intensity. A strength & conditioning you push hard burns more than an easy one, because effort is what the MET value of 6.5 represents, an average for this activity. Your fitness level and how much you rest between efforts shift it too, so treat these as a solid estimate rather than an exact count.

How we calculate strength & conditioning calories

Every number here uses the standard energy-expenditure formula: calories ≈ MET × body weight (kg) × time (hours). The MET value of 6.5 for strength & conditioning comes from the published Compendium of Physical Activities, the same reference researchers and fitness trackers use. We convert your weight to kilograms and multiply through, no fudge factors. See our methodology for the full formula and sources.