What Should You Track While Taking Ozempic, Wegovy or Mounjaro For Weight Loss?

Part 3 of The Training Ground Guide to GLP-1 Weight Loss Medications

If you're taking Ozempic, Wegovy, Mounjaro, or another GLP-1 medication, there is a good chance you're tracking one thing:

Your weight.

And that's understandable.

Weight loss is often the reason the medication was prescribed in the first place.

The scales move.

You feel encouraged.

You know you're heading in the right direction.

But there is a problem.

The scales only tell you one thing:

How much your body weighs.

They don't tell you whether you're losing:

• Fat

• Muscle

• Water

• Bone mass

• A combination of all four

And if you've read the previous articles in this series, you'll already know that's an important distinction.

Because the goal isn't simply to lose weight.

The goal is to improve health.

And health is much bigger than a number on a scale.

Why Weight Alone Isn't Enough

Imagine two people.

Both lose 15kg.

The scales celebrate equally.

BMI improves equally.

Friends and family congratulate both people equally.

Yet one person may have preserved most of their muscle mass while the other has lost a significant amount.

Those are very different outcomes.

But the scales cannot tell the difference.

This is why we encourage clients to track more than just body weight.

The First Metric: Body Weight

Let's start with the obvious one.

Body weight still matters.

It's useful.

It's easy to measure.

And it provides valuable feedback.

The mistake is making it the only metric that matters.

Think of body weight as the headline.

It tells you something changed.

But it doesn't tell you the whole story.

The Second Metric: Body Fat

If the goal is improving body composition, body fat becomes one of the most important things to monitor.

Because ideally, the majority of weight being lost should come from body fat.

This allows us to answer a question the scales cannot:

Is the weight loss improving body composition?

Without measuring body fat, we're largely guessing.

The Third Metric: Muscle Mass

This is the one most people overlook.

And it's often the most important.

Muscle contributes to:

• Strength

• Mobility

• Balance

• Physical function

• Metabolic health

• Healthy ageing

Unfortunately, significant weight loss can sometimes be accompanied by muscle loss.

That's why we regularly monitor muscle mass trends.

Not because we expect muscle mass to increase dramatically during weight loss.

But because we want to minimise unnecessary losses wherever possible.

The Fourth Metric: Strength

One of the simplest indicators of muscle preservation is strength.

Questions we ask include:

• Are your lifts improving?

• Are they staying stable?

• Are they declining significantly?

Strength isn't a perfect measure of muscle retention.

But it often provides useful clues.

If body weight is falling while strength remains relatively stable, that's usually encouraging.

If both body weight and strength are falling rapidly, it may be time to investigate further.

The Fifth Metric: Waist Circumference

This is one of the most underrated measurements available.

Waist circumference can provide useful information about changes in abdominal fat.

In many cases, people become healthier long before dramatic changes appear in the mirror.

Tracking waist measurements helps capture some of those improvements.

It's simple.

It's inexpensive.

And it often tells us more than people expect.

The Sixth Metric: Energy Levels

One thing we see regularly with GLP-1 users is a significant reduction in appetite.

Sometimes that's helpful.

Sometimes it creates new challenges.

Questions worth tracking include:

• How is your energy?

• How is your concentration?

• How are you feeling throughout the day?

Because successful weight loss shouldn't leave you feeling terrible.

If energy levels are consistently poor, it's worth investigating whether nutrition needs attention.

The Seventh Metric: Training Performance

This is where the conversation becomes practical.

How are you performing in the gym?

Can you still:

• Complete your workouts?

• Progress your training?

• Recover effectively?

Because if body weight is dropping but physical capacity is collapsing, that's information worth paying attention to.

The goal isn't simply becoming lighter.

It's becoming healthier and more capable.

The Eighth Metric: Protein Intake

Many people taking GLP-1 medications struggle to eat enough protein.

Not because they don't understand its importance.

Because they simply aren't hungry.

This is one of the most common challenges we encounter.

Protein becomes particularly important during weight loss because it helps support:

• Muscle retention

• Recovery

• Satiety

• Overall health

We'll explore this topic in much greater detail later in this series.

The Metric Most People Never Track

Now let's talk about the measurement that often changes everything.

Body Composition

This is where we move beyond simply asking:

"How much weight have you lost?"

And start asking:

"What was that weight made of?"

Because those are completely different questions.

A person can lose 10kg and dramatically improve their health.

A person can also lose 10kg and lose a substantial amount of muscle in the process.

Without assessing body composition, we often don't know which story we're looking at.

A Real-World Example

Recently, I sat down with a client taking a GLP-1 medication.

He was excited because he had lost almost 3kg since his previous check-in.

On the surface, it looked like a fantastic result.

But when we reviewed his body composition, we discovered that a significant proportion of the weight lost had come from active tissue rather than predominantly body fat.

The scales said:

"Great result."

The body composition data said:

"We need to make some adjustments."

That's the difference between tracking weight and understanding weight.

The Dashboard We Prefer

If we could choose only a handful of metrics for someone taking a GLP-1 medication, they would be:

1. Body weight

2. Body fat percentage

3. Muscle mass

4. Strength

5. Waist circumference

6. Protein intake

7. Energy levels

Together, those measurements tell a much more complete story than the scales ever could.

What We Tell Members At The Training Ground

The scales are a useful tool.

But they are only one tool.

Imagine trying to drive a car using only the speedometer.

You'd know how fast you're travelling.

But you'd have no idea about:

• Fuel levels

• Engine temperature

• Tyre pressure

• Oil levels

Weight is similar.

It's useful information.

It's just not enough information.

The more complete the picture, the better the decisions you can make.

The Bottom Line

If you're taking Ozempic, Wegovy, Mounjaro, or another GLP-1 medication, don't limit yourself to tracking body weight.

Track:

• Weight

• Body fat

• Muscle mass

• Strength

• Waist circumference

• Protein intake

• Energy levels

Because successful weight loss isn't simply about becoming lighter.

It's about preserving the things that make you strong, healthy, and capable while reducing the things that are holding you back.

The scales tell you how much you've lost.

Tracking the right metrics tells you whether you're losing the right things.

And that distinction can make all the difference.

➡️ Next Read: Should You Exercise While Taking Ozempic, Wegovy or Mounjaro?

References

1. Wilding JPH, Batterham RL, Calanna S, et al. (2021). Once-Weekly Semaglutide in Adults with Overweight or Obesity. New England Journal of Medicine, 384(11), 989-1002.

2. Jastreboff AM, Aronne LJ, Ahmad NN, et al. (2022). Tirzepatide Once Weekly for the Treatment of Obesity. New England Journal of Medicine, 387(3), 205-216.

3. American College of Sports Medicine. ACSM Guidelines for Exercise Testing and Prescription.

4. Kyle UG, Bosaeus I, De Lorenzo AD, et al. (2004). Bioelectrical Impedance Analysis—Part I: Review of Principles and Methods. Clinical Nutrition, 23(5), 1226-1243.