For decades, one number has dominated the conversation around fitness and weight loss:
Your body weight.
You step on the scale, see a number, and immediately decide whether you are making progress.
Down three pounds? Great week.
Up two pounds? Something must be wrong.
Exactly the same as last month? You must not be making progress.
But there is a major problem with thinking this way.
The scale tells you how much you weigh. It does not tell you what that weight is made of.
At Bodies By Design, that is one of the reasons we use InBody body composition testing. We want to know more than total body weight. We want to understand what is actually changing inside your body.
Because sometimes the scale isn’t moving while your body is changing dramatically.
This is probably the most important distinction to understand.
When people tell me they want to “lose weight,” what they usually mean is:
I want to lose body fat.
Those aren’t necessarily the same goal.
Your total body weight includes much more than body fat. It includes muscle, water, bone, organs and everything else that makes up your body.
So when the number on the scale decreases, the scale can’t tell you whether you lost body fat, muscle, water or a combination of all three.
That matters.
If someone loses 15 pounds but a significant portion of that weight comes from lean tissue, I don’t look at that the same way as losing body fat while maintaining or increasing muscle.
Research examining resistance training during weight loss has shown exactly why this distinction matters: people can experience similar changes in total body weight while having very different changes in fat mass and fat-free mass depending on how they train. See the research on resistance training and higher-quality weight loss PubMed Central (PMC)
The goal shouldn’t simply be to make your body smaller.
For most of our clients, the better goal is to reduce unnecessary body fat while preserving or building muscle and improving strength, fitness and overall health.
This is where the bathroom scale can really mess with your head.
Imagine you begin a strength-training and nutrition program weighing 180 pounds.
A few months later, you step back on the scale.
180 pounds.
If the scale were your only measurement, you might be frustrated.
“Three months of working out and I didn’t lose anything.”
But what if we looked deeper and discovered that you:
Lost 5 pounds of body fat
and
Gained 5 pounds of muscle or lean mass?
Your total body weight could still be:
180 pounds.
According to the scale, nothing happened.
According to your body composition, a lot happened.
Research refers to this process as body recomposition, where fat mass decreases while lean mass increases. A 2026 study using resistance training and higher-protein nutrition demonstrated that participants could simultaneously reduce fat mass and increase fat-free mass. Read the body recomposition study PubMed
This isn’t just something we see in research.
We’ve seen this principle play out with Bodies By Design clients for years. On our BBD Results page, you’ll find clients who have lost substantial amounts of body fat while also gaining muscle, becoming stronger and completely changing their body composition. One client reports losing 43 pounds of fat while gaining 12 pounds of muscle—a perfect example of why body weight alone doesn’t tell the complete story. See real Bodies By Design client results BBD for Life
That’s why I don’t want clients judging months of hard work by one number.
An InBody assessment uses bioelectrical impedance analysis, or BIA, to estimate different components of your body composition.
Instead of only seeing:
Body Weight: 180 pounds
we can look at much more useful information.
How much of your total body weight is estimated to come from body fat.
The percentage of your overall body weight that consists of fat.
An estimate of the muscle responsible for movement, strength and physical activity.
Additional measurements that give us a more complete picture of your composition.
Now we have something we can actually work with.
A person weighing 180 pounds with significant muscle and lower body fat is very different from another person weighing exactly 180 pounds with less muscle and considerably more body fat.
The bathroom scale sees the same number.
We don’t.
Before deciding where you want to go, you need to know where you’re starting.
That’s why establishing a baseline is so important at Bodies By Design.
If we know your starting body weight, body fat and muscle mass, we have objective measurements to compare against later.
Otherwise, we’re guessing.
It also allows us to have a much better conversation about your goals.
Maybe you thought you needed to lose 30 pounds.
But perhaps after looking at your body composition, our bigger priority should be decreasing body fat while building or protecting muscle.
Maybe your weight has been dropping quickly, but your muscle mass is dropping with it.
Or maybe your weight hasn’t moved much at all, but you’ve gained muscle and lost fat.
Without measuring body composition, you might never know.
Good data doesn’t replace coaching. It helps us coach better.
One InBody test gives us a snapshot.
Multiple tests give us a trend.
At Bodies By Design, I like to reassess body composition approximately every 60 to 90 days, and I recommend getting tested at least four times per year whenever possible.
The goal isn’t to obsess over each individual reading.
We want enough data throughout the year to see the bigger picture.
Are you gradually losing body fat?
Are you maintaining muscle while losing weight?
Are you building muscle?
Is your strength improving?
Has progress stalled?
Does something in your nutrition or training plan need to change?
Four or more checkpoints during the year give us much better information than constantly asking:
“What did I weigh this morning?”
It’s important to understand that InBody testing is a valuable tool, but it isn’t magic.
Bioelectrical impedance estimates body composition partly through the way electrical currents move through body water. That means hydration, recent meals, exercise and testing conditions can influence the numbers.
That’s exactly why consistency matters.
InBody itself recommends maintaining normal hydration, testing under similar conditions and at approximately the same time of day, using the restroom beforehand, and avoiding eating and exercise before testing. Read InBody’s official testing preparation guidelines InBody USA
This is also why I don’t want someone getting upset because their body-fat percentage moved a fraction of a percent on one test.
We’re looking for trends, not perfection.
Think months, not days.
That’s another reason testing every 60 to 90 days makes much more sense than constantly testing and reacting emotionally to small fluctuations.
Body weight naturally moves up and down.
Water retention, sodium intake, carbohydrates, hormones, digestion, bowel movements, travel, stress and exercise can all influence scale weight.
That means being two pounds heavier tomorrow morning doesn’t automatically mean you gained two pounds of body fat.
And being three pounds lighter after a dehydrating weekend doesn’t necessarily mean you suddenly lost three pounds of fat.
This is one reason allowing the bathroom scale to determine whether you’ve had a “good” or “bad” week can be incredibly misleading.
Muscle is one of the biggest reasons body composition matters so much to us at Bodies By Design.
A large systematic review involving more than 4,000 participants found that resistance-based exercise can reduce body fat and that combining resistance training with appropriate nutrition can produce substantial improvements in body composition. Read the systematic review on resistance training and body composition PubMed Central (PMC)
This is especially important as we get older.
We don’t want to chase weight loss at the expense of muscle.
We want to create bodies that are stronger, healthier, more capable and better prepared for aging.
That’s a completely different goal than simply trying to make the number on the scale as small as possible.
I’m not telling you to throw your bathroom scale away.
Body weight is useful information.
It simply shouldn’t be the only information.
At Bodies By Design, I would rather look at the whole picture:
Body weight
Body-fat percentage
Body-fat mass
Muscle mass
Strength
Measurements
Performance
Energy
How your clothes fit
Nutrition habits
Consistency
Mobility
Cardiovascular fitness
Those measurements together tell us much more than any single number ever could.
And when you look through the transformations on our Bodies By Design Results page, you’ll notice something important: the success stories aren’t only about pounds lost. You’ll see changes in body fat, muscle, strength, mobility, fitness and quality of life. BBD for Life
That’s what real progress looks like.
Your scale isn’t lying to you.
It just isn’t telling you enough.
If you lost five pounds of fat and gained five pounds of muscle, the scale could tell you absolutely nothing changed.
Your body composition would tell a completely different story.
That’s why we use InBody testing at Bodies By Design and why I encourage our clients to establish a baseline and then retest approximately every 60 to 90 days, with at least four assessments throughout the year.
The goal isn’t to become obsessed with numbers.
The goal is to understand what the numbers mean.
Establish your baseline.
Track the trend.
Make adjustments when necessary.
And don’t allow one number on a bathroom scale to determine whether all your hard work is paying off.
Because successful fitness isn’t simply about weighing less.
It’s about losing body fat, protecting and building muscle, becoming stronger, improving your health and creating a body that serves you well for the rest of your life.
Committed to your overall Health,