For women on semaglutide & tirzepatide
About a quarter of the weight lost in a fast deficit is lean tissue — muscle, and the strength that comes with it. Your prescription came with a dose schedule. It did not come with a plan for that.
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Nurture Arc Media · First Edition 2026 · 120 pages
The part nobody warns you about
The weight comes off, and for a while that is the whole story. Clothes fit. The number falls. People notice, and say so.
Then one afternoon you are standing at the kitchen counter with a jar you have opened a hundred times, and it will not turn. You run it under hot water. You try a tea towel. It feels like a small, stupid thing, so you don’t mention it to anyone.
A week later you notice you’ve started pushing off the arms of the chair to stand up. You don’t decide to do it. You just find that you already have.
Nobody told you that a fast deficit takes muscle as well as fat. Nobody told you it was worth measuring. So when your body starts saying it out loud, you have no idea what you’re listening to.
This is the part that goes unnamed. The stairs feel longer. Your grip gives out on the shopping bags. You’re tired in a way that doesn’t track with your injection schedule, and you assume that’s just what this is — the cost of getting smaller.
It isn’t the cost. It’s the gap. And the two things that close it are protein and lifting, both of which have decades of evidence behind them, and neither of which was handed to you with your prescription.
None of the signals opposite are reasons to stop your medication. They are reasons to be deliberate about the two countermeasures — starting now, while it’s still easy.
What the research actually says
You have seen the headline: these medications make you lose muscle. It isn’t wrong. It is also not what most people think it means — and the difference decides what you should do about it.
In the tirzepatide body-composition substudy everyone quotes, roughly 75% of the weight lost was fat and 25% was lean tissue. That 25% is the figure that travels.
Here is the part that almost never travels with it. In the same substudy, the placebo group showed a broadly similar split. The drug produced far greater total weight loss — but it did not demonstrate a dramatically different fat-to-lean pattern.
So the concern is real, but it has to be located precisely, because the vague version sends people toward the wrong actions.
Twenty-five percent of a small number is a small number. Twenty-five percent of forty pounds is ten pounds of lean tissue, and that is a meaningful amount to lose from a body that may not have had much to spare. The loss is also faster than the older dieting research was built on.
But the trial participants weren’t doing anything to protect their muscle. Neither are most people in the real world. That figure describes an unprotected deficit. It is a description of the default. It is not a ceiling, and it is certainly not a prediction about a woman who is eating enough protein and lifting twice a week.
Protein supplies the raw material.Chapter Eleven
Resistance training supplies the reason.
Chapter Sixteen · The titration protocol
Yours is not normal. Escalation weeks bring nausea, fatigue, and days where standing up is the achievement. A program with one setting is a program you abandon in week three — so this one has three settings, and the bad week is written in from the start.
What’s inside
The honest version of the muscle story, including the half of the research that never makes the headline. Who is genuinely at risk, and a twenty-minute baseline you take before week one.
Built around a reduced stomach, not a normal appetite. How to find your discussion range, density tables ranked by protein per calorie, twelve builds that hit 35–45g, and how to eat through nausea, constipation and aversion.
Two sessions a week, 35–45 minutes, dumbbells and a chair. Thirteen movements, each with a full illustrated page: start, movement, finish, an easier version, a harder version, the common mistake, and when to stop.
Sleep and what it does to the composition of weight loss. The bone chapter almost nobody writes. And the honest conversation about maintenance and what happens when you stop.
Baseline card, weekly tracker, training log, grocery list and travel kit — plus a one-page list of questions to take to your next appointment. Built to be printed and reprinted for all eight weeks.
Every clinical figure carries a superscript to a numbered source with journal, year, DOI or PMID, and sample size. Where the evidence is contested, the text says so.
Why you can trust the numbers
Most guides in this category repeat whatever is circulating. Every clinical figure here was checked against the referenced publication before this edition was finalised — and where a widely repeated claim could not be traced to a primary source, it was left out and the omission explained on the page.
“Resistance training prevents over 90% of lean mass loss.”
Traces to an opinion article, not a controlled trial. What is well supported is that lifting during weight loss meaningfully protects lean mass and bone compared with dieting alone. That case is strong enough without inflating it.
“Nausea lasts about 8 days. Constipation lasts about 47.”
Quoted confidently across the internet; could not be traced to a primary source. The book gives the pooled trial incidence instead, with the honest observation that constipation tends to outlast nausea considerably.
“Creatine adds one to two kilograms of water weight.”
Widely circulated, never verified. The book says only what is supportable: there may be a small increase in body water, the amount varies between individuals, and it is not body fat.
“Your body can only use 20–30g of protein at a time.”
Controlled 2023 evidence challenges this directly — but that study was in young men after training, so the book says exactly that too, rather than borrowing the finding and hiding the population.
Before you buy
You are not just losing weight. You are deciding what you will be made of afterwards.Chapter Twenty
The GLP-1 Muscle Preservation Blueprint
The 8-week protein and strength system for women, built around dose increases, nausea weeks and no appetite.
Delivered as a PDF you can read on a phone, tablet or laptop — or print, which is what Part Five is designed for.
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Questions
It is written for exactly that. Weeks one and two are deliberately easy, because you are learning movement patterns — and the soreness of an over-ambitious first week is the most common reason beginners quit. Every movement has an easier version, and each one has a full illustrated page showing the start, the movement, the finish, the common mistake, and when to stop.
A set of adjustable dumbbells or a few fixed pairs, a resistance band, and a sturdy chair. Roughly two metres by two metres of floor. A gym membership is optional — every exercise has a home version.
That is what the titration protocol above is for, and it is the chapter most readers use most. On a bad day you run a twelve-minute amber session, and it logs as a completed session — because preserving the habit through a difficult fortnight is worth more than any single hard workout you might have forced.
No, and deliberately not. Nothing in the book tells you what dose to take, when to escalate, when to hold or when to stop — those decisions belong to you and your prescriber. On discontinuation, the book explains that there is no validated universal tapering method and declines to invent one, which is a meaningful difference from most of what you’ll find online.
The nutrition and training principles apply across semaglutide and tirzepatide medications. Where evidence is specific to one drug — the bone trial run on liraglutide, or the contraceptive interaction labelled for tirzepatide and not semaglutide — the book names the drug and the limit rather than generalising.
Chapter Four asks you to record two function tests before week one: a thirty-second sit-to-stand and a grip measure. You retest at week four and week eight. Beginner gains on the sit-to-stand come fast, and that comparison — not the scale — is the payoff the book is built around.
It is a digital PDF, delivered instantly after checkout. Part Five is built to be printed on a standard home printer and reprinted each week for the eight-week program.
Yes, and there’s a worksheet designed for it — a one-page list of questions covering your protein target given your kidney function, whether your bloodwork should include B12, iron, vitamin D and calcium, and whether a bone density scan is appropriate for you. Take it to your next appointment.