Tearing down happens in the gym. Rebuilding happens in the kitchen.
While exercise is important, the truth is that body composition is largely determined by what—and how much—you eat.
The biggest problem? Most people have absolutely no idea how much food they’re actually consuming.
They think they’re eating healthy. They think they’re eating enough. They think they’re eating too much. But without tracking their food intake, they’re simply guessing.
And if you’re guessing when it comes to achieving a goal, it’s highly likely you’ll never get there.
Not losing body fat? You’re probably eating more than you think.
Not gaining muscle? You’re probably eating less than you think and not consuming enough protein.
One of my favorite sayings is:
“What can be tracked can be measured.”
If you aren’t measuring your nutrition, then you have no objective way to determine whether your plan is working or not.
Food Is Energy
Most people view food simply as something to eat. Instead, start viewing food as energy.
Everything you put into your body contains calories, and those calories provide fuel for daily life, exercise, recovery, and growth.
That energy comes from three macronutrients:
- Protein
- Carbohydrates
- Fat
These are often referred to as your “macros.”
When it comes to fitness, weight loss, and muscle gain, the basic principles are surprisingly simple:
Calories In vs. Calories Out
Your body is constantly burning energy.
If you consume more calories than you burn, you gain weight.
If you consume fewer calories than you burn, you lose weight.
At its foundation, body weight management is math.
There is certainly some nuance to this. Things like meal timing, food quality, sleep, stress, hormones, and intermittent fasting can influence results. But for now, let’s keep the principles simple.
Calories in versus calories out remains the foundation.
Fat Loss and Muscle Gain Are Not the Same Thing
One important concept many people misunderstand is that we don’t get to fully dictate what type of tissue the body gains or loses.
The number on the scale can go down, but if you’re not consuming enough protein and doing intense resistance training, there’s a good chance you’re losing precious muscle tissue and keeping the fat.
When you lose weight, some of that weight can come from body fat and some can come from muscle.
When you gain weight, some of that weight can come from muscle and some can come from body fat.
However, we can influence the process.
The most important factor is protein intake.
For most people, protein should be consumed at a minimum of 1 gram per pound of body weight per day.
If your goal is to maximize muscle growth, protein intake often needs to be even higher, around 1.3-1.5 grams per pound of body weight.
When protein intake is too low, the body is more likely to break down muscle tissue, especially during periods of calorie restriction.
This often leads to what many people call being “skinny fat”—someone who appears relatively thin but has low muscle mass and a high body fat percentage.
Building and maintaining muscle requires giving your body the raw materials it needs.
Protein is that raw material.
Stop Guessing
If you’re serious about changing your body composition, stop guessing.
Track your food.
Track your calories.
Track your protein.
Track your results.
I recommend using an app such as MyFitnessPal to record everything you eat and drink.
And when I say everything, I mean everything.
The handful of nuts.
The creamer in your coffee.
The spoonful of peanut butter.
The soda.
The “cheat meal.”
Every calorie counts.
If it goes into your mouth, it goes into the tracker.
For energy expenditure, a wearable device can be helpful. Devices such as an Apple Watch or an Oura Ring can provide estimates of calories burned throughout the day.
Personally, I prefer the Oura Ring because it’s more comfortable to wear, especially while sleeping.
The Takeaway
If your goal is to lose body fat, gain muscle, or improve your health, start by measuring what matters.
Remember:
- Your macros are protein, carbohydrates, and fat.
- Prioritize hitting your protein goal first.
- Track your food intake consistently.
- Use a fitness tracker to estimate calories burned.
- Record every meal and snack.
- Give yourself at least one to two weeks of consistent data before making adjustments.
Most people don’t have a nutrition problem.
They have a measurement problem.
Once you stop guessing and start tracking, you’ll finally have the information needed to make meaningful changes.
Because what can be tracked can be measured—and what can be measured can be improved.
