What percentage of total weight lost during rapid weight loss can
Chapter 1

The gut hormone revolution

Chapter 2

The vanishing muscle mystery

Chapter 3

Muscle as our metabolic super-engine

Chapter 4

The new rules of training

Ch 2 · The vanishing muscle mystery
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coach Declining muscle mass poses a direct danger to bone density.

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coach Bone Density Decline

As the weight falls fast, the bones grow thin, we have to lift to hold them up.

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Measuring progress only by subtraction blinds us to what we are destroying.

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The scale's big lie

coach Standard scales hide the loss of vital lean mass like muscle and bone by only measuring your total body weight.

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The calorie deficit trap

coach Strength training prevents the body from treating muscle as fuel during GLP-1 therapy.

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The Great Muscle Rescue
BETA

coach Defend your muscles from shrinking to discover why protecting strength matters more than ever.

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Fun Fact

Weight composition: In the landmark STEP-1 clinical trial for semaglutide, participants lost an average of about 10% of their total lean body mass alongside their fat loss.

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Glossary
sarcopenia (noun)
The progressive loss of skeletal muscle mass and strength, typically associated with aging or inactivity. Clinical trials show that up to forty percent of weight lost from semaglutide is skeletal muscle.

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Gossip

Do you think people care too much about scale weight versus strength?

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Quiz

What percentage of total weight lost during rapid weight loss can come from lean mass like muscle?

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Quiz

Why is the scale a misleading tool when tracking health during rapid weight loss?

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Quiz

Why does a severe caloric deficit cause the body to break down active muscle tissue?

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Quiz

How do GLP-1 medications physically cause a large calorie deficit in users?

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Quiz

Why is accelerated muscle loss particularly dangerous for older adults on GLP-1 therapies?

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Quiz

What is the medical term for the loss of skeletal muscle mass, strength, and function?

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Quiz

How do active muscles naturally help keep our bones strong and dense?

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Quiz

Which skeletal issue is a major risk when rapid weight loss causes both muscle and bone density to drop?

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