Yes, lifting weights burns fat, but modestly on its own. What studies show about fat loss from lifting vs cardio, calories burned, and the best plan.
Yes, lifting weights burns fat, but only modestly on its own. A 2022 meta-analysis of 58 studies found resistance training cut body fat by about 1.5 percentage points (0.55 kg of fat) versus no exercise, including visceral fat. In adults with overweight or obesity, lifting plus a calorie deficit cut about 5 kg of fat while keeping lean mass. For fat loss, lift, eat in a modest deficit, and keep protein high.
Lifting weights is usually sold as a way to build muscle, and cardio as the way to lose fat. The research is more interesting than that. Lifting does reduce body fat, even without a diet, but the effect is small. Where lifting really earns its place is during a diet, where it protects the muscle you would otherwise lose.
Here is what the studies show, how lifting compares with cardio, and how to set up training if fat loss is your goal.
Yes. Lifting weights reduces body fat, including the deep visceral fat around your organs, even when people do not change their diet. A 2022 meta-analysis by Wewege and colleagues pooled randomized trials of full-body resistance training lasting at least four weeks in healthy adults. Compared with no exercise, lifting reduced body fat percentage by 1.46 percentage points and body fat mass by 0.55 kg, and it also reduced visceral fat.
Two details from that review are useful. The effect was similar in men and women, and neither training volume nor the specific training setup made a measurable difference to how much fat people lost. In other words, any reasonable full-body program does the job.
Not much: expect around half a kilogram to a kilogram of fat over a few months if you lift without changing what you eat. In a 2022 meta-analysis of 114 trials in people with overweight or obesity, Lopez and colleagues found that resistance training alone reduced body fat by 1.6 percentage points and fat mass by 1.0 kg compared with no training, while adding 0.8 kg of lean mass.
The bigger results came from combining lifting with eating less:
| Approach (vs no intervention) | Body fat % change | Fat mass change | Lean mass change |
|---|---|---|---|
| Lifting alone | -1.6 points | -1.0 kg | +0.8 kg |
| Lifting plus cardio | -2.3 points | -1.4 kg | Not reported in the abstract |
| Lifting plus a calorie deficit | -3.8 points | -5.3 kg | About -0.3 kg (not significant) |
Source: Lopez et al. 2022, Obesity Reviews, people with overweight or obesity across age groups.
That last row is the key one. Dieting usually costs some muscle along with the fat. With lifting in the mix, lean mass was essentially maintained.
Cardio burns more fat per hour, but lifting builds muscle and protects it during a diet, so the best plan uses both. In the STRRIDE AT/RT trial, published by Willis and colleagues in 2012, 119 sedentary adults with overweight or obesity did eight months of aerobic training, resistance training, or both. The aerobic and combined groups lost more body weight and fat mass than the lifting-only group. The lifting and combined groups gained more lean mass than the aerobic group.
So if you only had time for one, cardio would move the scale more. But almost nobody trying to lose fat wants to lose muscle with it, and that is where lifting is hard to replace. If you are wondering how the two fit together while gaining instead, see should you do cardio while bulking.
A typical hour of lifting burns roughly 280 to 480 calories for an 80 kg (176 lb) person. The 2024 Adult Compendium of Physical Activities rates general weight training with 8 to 15 reps at 3.5 METs and vigorous powerlifting or bodybuilding sessions at 6.0 METs. One MET is about 1 calorie per kilogram of body weight per hour, so an 80 kg lifter burns about 280 calories in an hour of standard training and about 480 in an hour of hard training.
Those numbers include your resting metabolism and all the rest between sets, which is why a lifting session burns fewer calories per hour than steady running or rowing. Lifting burns fat mainly through what it does over weeks: more muscle, and a better result from your diet.
Yes, for a while, but the extra calories are small compared with what you eat. In a 2008 study by Hackney and colleagues, 16 young adults, half of them trained lifters, did a hard full-body session of eight exercises for eight sets of six reps with slow lowering. Their resting energy expenditure stayed significantly higher 24, 48, and 72 hours later. That was an unusually high-volume, soreness-inducing session, so treat it as the upper end of the "afterburn" effect, not something that replaces a calorie deficit.
Muscle also helps over the long run. A 2012 review by Westcott reported that 10 weeks of resistance training may add about 1.4 kg of lean weight, raise resting metabolic rate by about 7%, and reduce fat weight by about 1.8 kg.
No. Training a muscle does not burn the fat sitting on top of it. In a 2013 study by Ramírez-Campillo and colleagues, 11 young adults trained only one leg on the leg press for 12 weeks. Total body fat mass dropped by 5.1%, but the fat came off the arms and trunk, not the trained leg.
Ab exercises will build your abs, and leg training will build your legs, but where your body loses fat is decided by your overall energy balance and your genetics.
Lift the same way you would to build muscle, and let your diet create the deficit. Our guide on how to make a workout plan to lose weight puts it into a full week. The main steps:
That last step is where Alexandros helps. It is an iPhone app that works like a personal lifting coach you talk to. You log a session in plain English, like "deadlift 3x5 at 275, felt hard," rate how each set felt, and it tells you the weight and reps for next time using double progression. Ask how your squat is holding up during a cut and it answers with charts of your top weight, estimated 1RM, and volume, computed from your own log. Alexandros is in early access; its terms say certain features require a paid subscription through the App Store.
Lifting reduces overall body fat, including visceral fat around your organs, which a 2022 meta-analysis confirmed. It does not target belly fat specifically; fat comes off in a pattern set by your energy balance and genetics.
Cardio burns more calories per session and moved the scale more in the STRRIDE trial. Lifting keeps your muscle while you diet, so combining both gives the best body composition.
Yes, especially if you are new to lifting or returning after a break. In a large meta-analysis, lifting alone reduced fat mass by 1.0 kg while adding 0.8 kg of lean mass.
Trials in the 2022 Wewege meta-analysis lasted at least four weeks, and lifting alone produced measurable fat loss. How soon you see it in the mirror depends mostly on your calorie deficit.
Moderate to heavy weights in the 6 to 15 rep range are the best choice during a diet. They give your body a reason to keep its muscle, while the calorie deficit does most of the fat burning.
