It’s Not Willpower: Why Weight Loss Gets Harder Over Time

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Most people judge weight-loss success by one factor: the number on the scale.

If the scale goes down, they feel successful.
If it stops moving, they feel stuck.
If it goes up, they feel like they failed.

But here is the truth most people are never told:

The scale does not tell the whole story.

And that is why losing weight often gets harder every time you try.

Why does the same weight feel harder the second time

Imagine this.

You lose weight. Your clothes fit better. You feel lighter. The scale confirms success. Over time, the weight slowly comes back. When you step on the scale again, it shows the same number as before, for example, 200 pounds.

But this time, things feel different.

    • You get tired more easily
    • You must eat less just to maintain your weight
    • Fat seems to return faster
    • Losing weight feels slower and harder

That is not in your head.

Even though the scale shows the same number, your body is not the same.

What actually changed

When people lose weight, especially through repeated dieting or rapid weight loss, the body not only loses fat.

It also loses muscle.

Muscle is not just for strength or appearance. Muscle is the part of the body that:

    • Burns calories all day
    • Helps manage blood sugar
    • Supports fat burning

If muscle is lost during weight loss and the weight is later regained, most of the weight that returns is fat, not muscle.

So, the scale may show the same number, but the body has:

    • Less muscle
    • More fat

That single change makes weight loss much harder the next time.

A story most people can relate to

Let’s look at a real-life example.

At age 42, Sheila weighed 200 pounds. Her scale indicated that her body fat was 40%. Like many people, she decided it was time to lose weight.

She worked hard and lost 50 pounds. Upon rechecking, her body fat was 32%. She felt better, looked better, and her clothes fit again. For the next couple of years, she kept the weight off.

But life happened.

Slowly, the weight came back. By age 47, Sheila had regained 200 pounds, the exact same weight she had weighed seven years earlier.

Same weight.
Same scale number.

But this time, her body fat was 43 percent.

She did not feel the same. Losing weight felt harder. She had to eat less just to maintain her weight. Fat appeared to return more quickly than before.

So, what changed?

The scale missed the most important part

When Sheila lost weight the first time, she not only lost fat. She also lost muscle.

When the weight returned, it returned mostly as fat, not muscle.

That meant:

    • Less muscle than before
    • More fat than before
    • A slower metabolism

Even though the scale showed the same number, her body was very different.

Understanding your body beyond the scale

Most people only know two numbers:

    • Their weight on the scale
    • Their body fat percentage

Used correctly, those two numbers can tell a much better story.

Step 1: Calculate fat mass

Multiply body weight by body fat percentage.

Example:
200 pounds × 40% = 80 pounds of fat

Step 2: Calculate fat-free mass

Subtract fat mass from total body weight.

200 − 80 = 120 pounds of fat-free mass

Fat-free mass means everything in the body that is not fat, including:

    • Muscle
    • Bone
    • Organs
    • Water
    • Connective tissue

This calculation is accurate and helpful, but it still does not explain how well the body burns calories.

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Why lean body mass matters more than fat-free mass

Here is where most people get confused.

Fat-free mass is a broad category. It includes all non-fat tissue, even tissue that does not meaningfully affect metabolism.

Not all non-fat weight helps you burn fat.

Bone does not burn many calories.
Water does not burn calories.
Hair and teeth do not affect metabolism.
Muscle does.

Lean body mass tells the real story

Lean body mass refers to the portion of fat-free mass that drives metabolism, particularly muscle.

Muscle:

    • Burns calories at rest
    • Pulls sugar out of the blood
    • Improves insulin sensitivity
    • Supports fat burning

This is an important distinction.

Fat-free mass can be calculated with simple math.
Lean body mass cannot be calculated as easily because it reflects muscle and metabolically active tissue.

Lean body mass is best estimated, not calculated, using:

    • Body composition tools (DEXA, bioelectrical impedance)
    • Strength levels
    • Energy levels
    • Blood sugar control

This is why two people with the same fat-free mass can experience very different weight loss results.

Why fat returns faster

Muscle and fat behave very differently.

    • Muscle uses energy
    • Fat stores energy

When muscle decreases and fat increases:

    • Insulin stays elevated longer
    • Fat burning is suppressed
    • The body becomes better at storing calories

The body is not broken.
It is doing what it was designed to do: protect energy.

Why does the body feel less flexible?

With less muscle, the body struggles to switch between burning sugar and burning fat.

This means:

    • Fasting feels harder
    • Exercise feels more exhausting
    • Cutting calories feels stressful

Weight loss begins to feel like a struggle rather than progress.

Where omega-3s quietly fit into the picture

Most body composition scans miss an important detail.

Omega-3 fatty acids are part of cell membranes, especially in muscle cells. These membranes control how insulin works and how fuel enters the cell.

When omega-3 levels are low:

    • Cell membranes become more rigid
    • Insulin does not work as well
    • Muscles struggle to use glucose
    • Fat burning slows

Two people with similar body weight and body composition may experience different fat-loss outcomes due to differences in how their lean tissue functions.

Why the scale is misleading

Two people can weigh the same yet have very different body compositions.

Or the same person can weigh the same at two different times and have:

    • A faster metabolism one time
    • A slower metabolism another time

The scale does not show:

    • Muscle loss
    • Insulin sensitivity
    • Metabolic efficiency

It only shows weight.

Bottom line

Weight loss gets harder over time, not because people fail, but because they unknowingly lose the very tissue that helps them lose weight.

When the focus is only on the scale:

    • Muscle is often lost
    • Fat returns faster
    • Metabolism slows
    • Insulin works less effectively

The real goal is not just weight loss.

The real goal is fat loss while protecting or rebuilding lean body mass.

When lean body mass is protected:

    • The body burns more calories at rest
    • Blood sugar control improves
    • Fat burning becomes easier
    • Weight loss feels less like a battle

One sentence to remember

The scale tells you how much you weigh. Lean body mass indicates how well your body functions. 

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References

    1. Hall, K. D., & Guo, J. (2017). Obesity energetics, body weight regulation, and the effects of diet composition. Gastroenterology, 152(7), 1718–1727. https://doi.org/10.1053/j.gastro.2017.01.052
    2. Heymsfield, S. B., & Wadden, T. A. (2017). Mechanisms, pathophysiology, and management of obesity. New England Journal of Medicine, 376(3), 254–266. https://doi.org/10.1056/NEJMra1514009
    3. Wolfe, R. R. (2006). The underappreciated role of muscle in health and disease. American Journal of Clinical Nutrition, 84(3), 475–482. https://doi.org/10.1093/ajcn/84.3.475
    4. Zurlo, F., Larson, K., Bogardus, C., & Ravussin, E. (1990). Skeletal muscle metabolism is a major determinant of resting energy expenditure. Journal of Clinical Investigation, 86(5), 1423–1427. https://doi.org/10.1172/JCI114857
    5. Calder, P. C. (2015). Marine omega-3 fatty acids and inflammatory processes. Biochimica et Biophysica Acta (BBA) – Molecular and Cell Biology of Lipids, 1851(4), 469–484. https://doi.org/10.1016/j.bbalip.2014.08.010

________

Robert Ferguson is a California- and Florida-based single father of two daughters, clinical nutritionist, Omega Balancing Coach™, researcher, best-selling author, speaker, podcast and television host, health advisor, NAACP Image Award Nominee, creator of the Diet Free Life methodology, and Chief Nutrition Officer for iCoura Health. He also serves on the Presidential Task Force on Obesity for the National Medical Association and the Health and Product Advisory Board for Zinzino, Inc.

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