How to Start Strength Training Safely After an Injury
August 13, 2026
Many people believe that cardio is for burning fat and weights are only for building muscle. It is one of the most common ideas in fitness, and it leads a lot of people to skip strength training when they want to lose fat. The reality is more encouraging than that.
So, can strength training burn fat? Yes. Research suggests that strength training can help reduce body fat, even on its own, and it offers some benefits for fat loss that cardio alone does not. This article explains what the evidence says, how strength training affects fat loss, and how to use it sensibly.
Key Points
- Strength training can help burn fat. Research suggests it reduces body fat even when done on its own, with results broadly comparable to cardio.
- Strength training builds muscle while reducing fat. This is something cardio alone usually does not do.
- The "afterburn effect" is real but modest. It is a small bonus, not a major source of fat loss.
- The scale can be misleading. Because strength training can build muscle as you lose fat, your body can change shape even when your weight barely moves.
- The most effective approach combines strength training, sensible nutrition, and some cardio. No single type of exercise is a magic solution.
The Short Answer: Yes, Strength Training Can Help Burn Fat
Yes, strength training can help burn fat. Strength training, also called resistance training, is any exercise where you work your muscles against resistance, such as weights, machines, bands, or your bodyweight.
For a long time, fat loss was associated mostly with cardio, while strength training was seen only as a way to build muscle. Current evidence suggests that view is incomplete. Strength training can reduce body fat on its own, and it also helps preserve and build muscle at the same time, which matters for how your body looks and functions.
Takeaway: Strength training can help burn fat, and unlike cardio alone, it can build muscle while reducing fat at the same time.
What the Research Says About Strength Training and Fat Loss
The clearest evidence comes from a large 2021 review of existing studies. A systematic review and meta-analysis from the University of New South Wales, published in the journal Sports Medicine, combined the results of 58 studies involving around 3,000 participants, none of whom had previous weight-training experience.
The findings were notable. On average, participants lost about 1.4 percent of their total body fat through strength training alone, without dieting or doing cardio. For most people that worked out to roughly half a kilogram of fat. The participants trained for about 45 to 60 minutes per session, around 2.7 times a week, over roughly five months.
The researchers noted that this level of fat loss is broadly similar to what people might lose through cardio. In other words, strength training on its own produced a meaningful reduction in body fat. The study's authors still recommended that the best overall approach for fat loss combines nutritious eating with both strength training and cardio.
Takeaway: A large 2021 review found people lost about 1.4 percent of their body fat through strength training alone, a result broadly comparable to cardio.
How Strength Training Burns Fat
Strength training supports fat loss in a few connected ways. Understanding them helps explain why it works.
It builds muscle, which supports your metabolism
Strength training builds muscle, and muscle is active tissue that uses energy. Building and maintaining muscle helps support your metabolism over time, and it plays a genuine role in why strength training is effective for changing body composition. The day-to-day effect is steady rather than dramatic, which is part of why consistent training matters more than any single session.
It burns calories during and after your workout
Like any exercise, strength training burns calories while you do it. It also causes your body to keep using slightly more energy afterward, as it recovers. This is sometimes called the afterburn effect, covered in more detail below.
It helps you lose fat, not just weight
This is the part that often gets missed. When you lose weight through dieting or cardio alone, some of that weight can come from muscle as well as fat. Strength training sends your body a signal to hold onto muscle, which research suggests helps ensure more of the weight you lose comes from fat. The result is a change in body composition, not just a lower number on the scale.
Takeaway: Strength training burns fat by building calorie-using muscle, burning calories during and after exercise, and helping you lose fat rather than muscle.
The "Afterburn Effect": A Real Bonus, Backed by Research
You may have heard that strength training keeps burning energy for hours after you finish, an idea known as the afterburn effect, or EPOC (excess post-exercise oxygen consumption). The research confirms it is real. After a demanding session, your body continues using extra energy as it recovers and rebuilds, and studies show that heavier resistance training and higher-intensity work tend to produce a larger and longer afterburn than gentle, steady activity.
Research also helps put the effect in perspective. Studies measuring EPOC generally place the extra energy use in the range of roughly 50 to 200 calories after a session, a welcome bonus on top of the main benefits rather than the main event. The larger, more reliable wins come from what strength training does over time: building muscle, improving how your body handles energy, and changing your body composition. That is also how good coaching helps. Rather than relying on any single effect, a strong program focuses on consistent training, good form, and steady progress, which is what the evidence shows delivers results.
Takeaway: Research confirms the afterburn effect is a genuine bonus of strength training, while the biggest fat-loss benefits come from training consistently and well over time.
Strength Training vs Cardio for Fat Loss
A common question is whether strength training or cardio is better for fat loss. Both can help reduce body fat, and they offer different benefits.
- Cardio tends to burn more calories during the workout itself and is good for cardiovascular fitness and heart health.
- Strength training burns fewer calories in the moment but builds muscle, supports metabolism, and helps you keep muscle while losing fat.
For changing the shape of your body, strength training has an advantage because it builds muscle as you lose fat. For heart and lung fitness, cardio has the edge. This is why most evidence-based advice, including from the 2021 review above, suggests combining both alongside sensible nutrition, rather than choosing one and ignoring the other.
Takeaway: Strength training and cardio both help burn fat. Strength training is better for shaping your body, cardio is better for heart fitness, and combining them works best.
Why the Scale Can Be Misleading
One reason people underestimate strength training for fat loss is that they judge progress by the scale. The scale can be misleading, because it measures your total body weight without separating fat from muscle, water, and bone.
When you strength train, you can lose fat and gain a little muscle at the same time. Because muscle is denser than fat, the number on the scale might not drop much even though your body is becoming leaner and firmer. This is why the researchers behind the 2021 review encouraged people to look at how their clothes fit and how their body feels and moves, rather than focusing on the scale alone.
Takeaway: The scale does not separate fat from muscle, so it can hide real fat loss from strength training. Track how you look, feel, and move instead.
How to Use Strength Training for Fat Loss
If you want to use strength training to help burn fat, a few simple, evidence-based principles apply:
- Train your major muscle groups regularly. Two to three sessions a week is a practical starting point for most people.
- Focus on compound movements. Exercises that work several muscles at once, like squats, presses, and rows, give you more value per session.
- Pay attention to nutrition. Fat loss still depends on overall energy balance, and eating enough protein helps you keep muscle while losing fat.
- Be consistent and patient. Meaningful change in body composition usually takes weeks to months, not days.
- Add some cardio for overall health. It supports your heart and conditioning alongside your strength work.
You do not need a complicated plan. Consistent strength training, sensible eating, and a bit of patience tend to matter more than any single workout or trick.
Takeaway: To burn fat with strength training, train regularly, focus on compound movements, eat well with enough protein, stay consistent, and add some cardio for health.
If you would like help using strength training to reach your fat-loss goals, with a plan built around where you are starting from, you can book a complimentary consultation with SURGE.
Frequently Asked Questions
Can strength training burn fat without cardio?
Yes. Research suggests strength training can reduce body fat even when done on its own, without dieting or cardio. A 2021 review found people lost about 1.4 percent of their body fat through strength training alone. That said, combining strength training with sensible nutrition and some cardio tends to work best overall.
How long does it take to burn fat with strength training?
It varies from person to person, but meaningful change in body composition usually takes weeks to months rather than days. In the 2021 review, participants trained for about five months. Consistency over time matters more than any single workout.
Does strength training burn fat or build muscle?
It can do both. Strength training builds and preserves muscle while also helping reduce body fat. This is one of its main advantages over cardio alone, which usually does not build muscle. Because of this, your body can become leaner and firmer even if the scale does not move much.
Is strength training or cardio better for fat loss?
Both can help reduce body fat. Strength training is better for building muscle and changing the shape of your body, while cardio is better for heart and lung fitness. Most evidence-based advice suggests combining the two alongside good nutrition rather than choosing only one.
How often should I strength train to lose fat?
Two to three sessions a week is a practical starting point for most people. In the research, participants trained on average around 2.7 times a week. Choosing a frequency you can stay consistent with matters more than training as often as possible.
Why is the scale not moving even though I am strength training?
The scale measures total body weight and does not separate fat from muscle. Because strength training can build muscle as you lose fat, your weight may stay similar even as your body becomes leaner. Tracking how your clothes fit and how you look and feel is often more useful than the scale.
Strength training is not just for building muscle. It is a genuinely effective part of fat loss, and for changing how your body looks and feels, it deserves a central place in your routine.
References
- Wewege, M.A., Desai, I., Honey, C., Coorie, B., Jones, M.D., Clifford, B.K., Leake, H.B., & Hagstrom, A.D. (2021). The Effect of Resistance Training in Healthy Adults on Body Fat Percentage, Fat Mass and Visceral Fat: A Systematic Review and Meta-Analysis. Sports Medicine. https://www.sciencedaily.com/releases/2021/09/210922121905.htm
- Resistance exercise added to dietary weight loss: systematic review and meta-analysis on fat loss and the preservation of muscle (fat-free mass). British Journal of Sports Medicine (2025). https://pmc.ncbi.nlm.nih.gov/articles/PMC12406911/
- Morton, R.W., et al. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. British Journal of Sports Medicine. https://pmc.ncbi.nlm.nih.gov/articles/PMC5867436/
- EPOC (the "afterburn effect") explained, summarizing typical post-exercise calorie ranges for resistance and interval training. https://www.myzone.org/blog/master-trainers/epoc-explained
This content is for general informational purposes only and does not constitute personalized medical, fitness, or nutrition advice. Always consult a qualified professional before making changes to your training, nutrition, or health routine.
