Can You Lose Fat and Gain Muscle at the Same Time?

One of the most common questions we hear is:

“Can I lose weight and gain muscle at the same time?”

The honest answer is… sometimes.

When someone is new to strength training, their body can often do both for a short period of time. When muscles are stimulated in a new way, the body can build a bit of muscle while body fat decreases.

But after that initial phase, it becomes much harder to pursue both goals at the same time.

That’s because of something called energy balance.

What Is Energy Balance?

Energy balance is simply the relationship between the calories you consume and the calories your body burns.

Your body burns calories in four main ways:

Basal Metabolism (BMR) – the energy your body uses just to stay alive. This includes breathing, circulating blood, regulating temperature, and keeping your organs functioning.

Exercise (PA) – your planned workouts like strength training, running, or fitness classes.

Daily Movement (NEAT) – all the movement you do outside of workouts, like walking around the house, working, doing chores, or running errands.

Digesting Food (TEF) – your body actually uses energy just to digest and process the food you eat.

When we combine those four things, we get your total daily energy burn.

Energy Out = BMR + PA + NEAT + TEF

For most people, BMR makes up about 60% of the calories burned each day, while exercise, daily movement, and digestion make up the rest.

Energy In = Foods, Drinks and supplements you consume.

Why This Matters for Your Goals

Once we understand energy balance, the strategy becomes much clearer.

To gain muscle:

You generally need a positive energy balance.

Calories consumed > Calories burned

To lose body fat:

You need a negative energy balance (a calorie deficit).

Calories consumed < Calories burned

There are two main ways to create that calorie deficit:

1. Eat fewer calories

2. Burn more calories through activity

However, we generally don’t recommend aggressively doing both at the same time, unless someone is significantly overeating. Drastically cutting calories while dramatically increasing exercise often leads to burnout and makes consistency much harder.

A Simple Example

Let’s say someone’s daily energy expenditure looks like this:

BMR: 1500 calories

Physical Activity: 400 calories

NEAT: 400 calories

Thermic Effect of Food: 300 calories

Total daily energy burn = 2,600 calories

If they eat 2,600 calories per day, their weight will likely stay about the same.

For sustainable progress, we typically aim for about a 300 calorie adjustment.

For fat loss:

2,600 – 300 = 2,300 calories per day

That 300 calorie difference could come from:

• eating 300 fewer calories, or

• burning 300 additional calories through activity.

• eating slightly less calories and doing a little more movement totalling a 300 calorie change in balance.

I know we said we don't recommend doing both at the same time, but that's more for large aggressive changes!

For muscle gain, the opposite would be true—you would eat about 300 additional calories per day.

A Simple 3-Step Action Plan

If you want to make progress, start here:

1. Track your food intake

Before making big changes, track what you’re currently eating for about a week. This helps you understand your starting point and where your calories are actually coming from.

2. Estimate your calorie needs

Once you know where you are, you can estimate how many calories your body likely burns each day based on your size, activity level, and lifestyle.

3. Build a plan that matches your goal

From there, create a small and sustainable adjustment—either a slight calorie deficit for fat loss or a slight calorie surplus for muscle gain.

Small, consistent changes over time almost always work better than extreme short-term efforts.

If you’d like help figuring out your calorie target, I’d be happy to help. Just send us an email (letsgetampt@gmail.com) or text on the AMPT line (916-545-1233) with the word "calories" and we can help you estimate what your daily intake should look like.