You know the routine: Losing weight means chowing down on fewer calories than you’re burning. But if you’re not smart about it, even the best-intentioned plans can backfire. That’s because dropping kilos always means shedding a mix of both fat and muscle. Since muscle burns more calories than fat, having less of it slows down your metabolism, making it even harder to shed weight, says Albert Matheny, C.S.C.S., R.D., founder of the Soho Strength Lab. Fortunately there are steps you can take to minimise muscle loss. To keep your body’s calorie-burning machine revved, steer clear of these six habits that make you more likely to lose muscle


Eating less calories than it takes to maintain your basal metabolism (i.e., the minimum energy your body needs at rest for things like breathing and keeping your organs going) puts your body into starvation mode, where it burns both fat and muscle for fuel. “Your body’s main goal is to keep you alive, so it’s going to make sure that you have enough energy for basic functions,” says Matheny.

“When you’re not taking in enough calories, your body takes from stored carbs (glycogen), stored fat, and protein from muscle,” explains Nick Clayton, C.S.C.S., the personal training program manager for the National Strength and Conditioning Association. Exactly how many calories is too few depends on your current weight, although no one should dip below 1,000 calories.

The solution: To maximise fat loss and minimise muscle loss, Clayton recommends a deficit of between 500 to 1,000 calories from your current daily intake, with about half coming from calories you’ve cut and half from exercise.


Weight loss isn’t just about how much you eat—it’s about what you put in your mouth, too. A 2016 study found that when people went on a low-calorie diet for four weeks, those who ate more protein (2.4 vs. 1.2 grams per kilogram of body weight) lost 27 percent more fat and gained eight times as much lean muscle mass. That’s because the complete protein found in foods like eggs, poultry, dairy, and meats offers all nine of the essential amino acids your body uses to build and maintain muscle. “If you’re not getting enough protein, you’re not giving your body the building blocks to build muscle efficiently. If you’re losing weight, you’ll lose even more muscle,” says Matheny.

The solution: For dieters, Clayton suggests 1.6 grams of protein per kilogram of body weight. If you weigh 55kgs, you’d aim for 80 to 90 grams of protein daily—that’s about one-third of your total daily calories, or 25 grams of protein per meal plus a protein-rich snack.


To maintain muscle, your body needs a push. “When you’re not stimulating your muscle, your body won’t build it,” says Matheny. “If you’re on a really low-calorie diet and not resistance training, you definitely won’t add muscle, and you may lose some.” Indeed, one small 2014 study found that when obese people went on a diet, those who resistance trained lost about the same amount of weight overall as those who weren’t lifting—and they lost half as much muscle (0.9 vs. 2 kg). In fact, lifting weights might actually be a better long-term fat-blaster than cardio: A 2015 Harvard study of more than 10,500 people found that over 12 years, people who weight trained lost about twice as much belly fat (0.33 cm vs. 0.67 waist circumference) as those who just did cardio.

The solution: To see benefits, Clayton suggests fitting in one to two intense weight-lifting sessions per week incorporating mostly full-body moves like squats, lunges, and pushups. Use as much weight as you can handle and work to exhaustion for two to three sets of eight to 12 reps each.


Refueling right after you work out is as important as the weights you lift. “If you’re not eating after workouts, there’s a higher chance you won’t recover. And if you’re not repairing the muscle you broke down, you’ll lose it,” says Matheny. The longer you wait to munch, the less efficient and effective that repair process will be.

The solution: Matheny says if you’ve worked out moderately for at least 45 minutes, you should down about 20 grams of high-quality protein, like a protein shake or Greek yogurt, within 15 to 30 minutes


You might think that sweating it out on the elliptical for an hour every day is the way to churn through calories and body fat when you’re dieting, right? Wrong. Unlike weight lifting, which engages all of your muscle fibrEs, cardio doesn’t build muscle. In fact, it can burn it. Although your body uses mostly stored fat to fuel low-intensity cardio like an hour of walking, if you’re on a calorie deficit and jog for 45 minutes your body taps into muscle for fuel. “Moderate-intensity exercise is most likely to lead to muscle wasting,” says Clayton. A good sign that’s happening is when, a couple of sessions in, you can’t make it the full distance at the same intensity, says Matheny.

The solution: To avoid muscle loss, schedule low-intensity cardio, like walks, three to four days per week, suggests Clayton. Then, one to two times per week, blast through four minutes of high-intensity cardio intervals (alternating 20 second all-out sprints with 10 seconds rest). “It shocks your system and has a ton of health benefits, including protecting your muscle,” says Clayton.


To shed weight efficiently, your body needs enough rest. “If you’re not sleeping, your hormones aren’t functioning properly. You’ll have high cortisol levels, which increases the chance that you’ll store carbs as fat,” says Matheny. What’s more, because you’re tired you won’t be able to work out as hard. That means you won’t build as much muscle and over time may even lose the bit you’ve got.

The solution: Don’t skimp on hitting the sack. Try to schedule in seven to nine hours every night.

This article originally appeared on Women’s Health

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