The Right Balance of Calories

Losing fat while building muscle is all about finding the sweet spot with calories. You need enough fuel to support muscle growth, but not so much that your body stores the excess as fat.

Being in a large calorie deficit makes it very difficult to build muscle. On the flip side, eating way more calories than your body needs will usually lead to fat gain along with muscle.

This is why extreme “bulking” approaches usually aren’t necessary. While eating hundreds of extra calories per day can increase muscle mass, research shows that a small calorie surplus works just as well, without the extra fat gain.

Recommendations from professional organizations like the Academy of Nutrition and Dietetics recommend increasing intake by around 200 calories per day when your goal is muscle growth, rather than going overboard.

This approach supports muscle building while keeping fat gain to a minimum, making it ideal if you’re aiming for fat loss and muscle gain at the same time.

However in practice, eating at maintenance calories or in a slight deficit (~200 calories) can also work. It just may take a little longer to build that muscle and it becomes extra important to eat enough protein and weight train as discussed below.

Eat Plenty of Protein

Protein plays a key role in building muscle. It provides amino acids, which are the building blocks your body uses to repair and grow muscle tissue after exercise. You can train as hard as you like in the gym, but without enough protein, your body simply won’t have what it needs to build muscle effectively.

So how much protein do you need to lose fat and gain muscle?

While recommendations vary, the International Society of Sports Nutrition suggests aiming for around 1.4 to 2.0 grams of protein per kilogram of body weight for most active individuals to support muscle growth.

Getting enough protein can improve body composition in a few helpful ways. It helps you feel fuller for longer, which can make fat loss easier, and one study found that higher protein intakes are linked with lower body fat levels and greater muscle mass in people who exercise regularly.

Your exact protein needs will depend on factors like your activity level, goals, and body size, so working with a registered dietitian can help personalize this. If you’re looking for easy ways to increase your protein intake, I’ve compiled my favorite low calorie high protein snacks in this post and have plenty of high-protein recipes for you to browse through.

When choosing protein sources, focus on whole foods first such as fish, chicken, lean beef, eggs, dairy, soy foods, beans, and lentils. These don’t just provide protein, they also contain important vitamins and minerals that support overall health.

And one final tip: spread your protein intake across the day. Unlike carbohydrates, which your body can store for later use, excess protein isn’t stored in the same way. Because of this, it’s best to include a source of protein regularly throughout the day.

Aiming for a protein-rich meal or snack every 3 to 4 hours can help maximize muscle repair and growth.

Don’t ditch carbohydrates

With carbs being cut out in so many diets, it can feel tempting to go low carb when trying to lose fat and gain muscle. But this often backfires.

Carbohydrates are your body’s main fuel source, especially for workouts. When you eat enough carbs, protein can do its job repairing and rebuilding muscle tissue. When carbs are too low, your body may use protein for energy instead, which can slow muscle recovery and growth.

This is why meals that include both protein and carbohydrates are ideal, particularly after exercise.

Focus on high-quality carbohydrate sources that provide steady energy, such as whole grain bread, brown rice, quinoa, oatmeal, sweet potatoes, and fruit. Many of these also provide fiber, which supports digestion and heart health..

So how many carbs do you actually need?

According to current guidelines, the Academy of Nutrition and Dietetics (AND), Dietitians of Canada (DC), and the American College of Sports Medicine (ACSM) suggest that people doing moderate exercise (about 1 hour a day) typically need around 5 grams of carbohydrate per kilogram of body weight per day. As training intensity or duration increases (1-3 hours a day), needs can rise to 6 to 10 grams per kilogram, especially for those doing longer or more intense workouts.

Rather than cutting carbs, think of them as a tool to fuel your workouts, improve recovery, and support muscle growth while losing fat.

If you enjoy simple balanced meals that include healthy carbs, you’ll love my easy breakfast recipes, including oatmeal-based meals and wholesome options like air fryer apples, which make nourishing eating both easy and enjoyable.

Weight Training Vs Cardio

While nutrition is a huge piece of the puzzle, exercise is just as important when it comes to losing fat and building muscle.

Strength training (also called resistance or weight training) is what actually stimulates muscle growth. When you lift weights, you create small stresses in the muscle fibers, which then repair and grow back stronger and more toned over time.

If you’re new to lifting, a good general starting point is:

• Choose 3 to 4 exercises per muscle group
• Perform 3 to 4 sets of 8 to 12 reps
• Train around 3 to 5 days per week

As you get stronger, gradually increase the weight or difficulty so your muscles continue to adapt and grow. This is called progressive overload and it’s key for results.

If you’re unsure where to start, working with a qualified personal trainer can be really helpful to learn proper form and build a program that suits your level.

Cardio still has a place too.

Activities like walking, jogging, cycling, or swimming are great for heart health and can support fat loss when paired with good nutrition. For most people, aiming for 1 to 2 cardio sessions per week or aiming for a generous daily step count is plenty alongside strength training.

The takeaway: If your goal is to lose fat and gain muscle, prioritize weight training and use cardio as a helpful add-on, not the main focus.

Get quality rest

Believe it or not, rest is a vital part of losing fat, building muscle, and supporting your overall health.

While you sleep, your body releases human growth hormone, which plays a key role in muscle repair, tissue growth, metabolism, and stress regulation. Good sleep has also been linked with better workout performance, lower injury risk, and improved endurance.

In other words, progress doesn’t just happen in the gym, it happens when you recover.

Just like training and nutrition, getting enough sleep takes intention. Aim for 7 to 9 hours per night to give your body the time it needs to repair and rebuild.

Quality sleep also plays a big role in appetite control and weight management. If late-night hunger tends to trip you up, you may find my guide to healthy bedtime snacks for weight loss or my proven sleep tips helpful for supporting both recovery and fat loss goals.

Rest days matter too.

Taking time off from intense exercise allows your muscles to recover, grow stronger, and reduces the risk of burnout and injury. This applies whether you’re a beginner or someone who trains regularly.