GLP-1s, Weight Loss… and the Muscle Nobody’s Talking About

Most of what makes it into the public conversation about GLP-1s is useless gossip.

Misuse.
Cost.
Scarcity.
Side effect scare stories.
The impending doom that awaits you once you stop taking them.

Usually wrapped up in a headline designed to make you feel either terrified or morally compromised for even considering them.

Having read up on them extensively — and having seen their effects first-hand with multiple clients — I don’t buy into the hysteria.

In fact, I have a much more positive view of them.

For some people, GLP-1s are the first thing in years that actually turn down the volume on food noise. They remove the stress around food and give people the breathing room they need to make better decisions. A sense that weight loss might finally be possible without white-knuckling their way through every meal like it’s a hostage negotiation.

And if you’re using one, let me be clear:
You haven’t somehow “cheated” and you’ve got nothing to feel guilty about.

Anyone loudly calling GLP-1s “the easy option” has either never struggled with their weight or has the emotional range of a dead cat.

I’ve been a personal trainer for 15 years. Before that I struggled with my own weight -from the age of 12 until around my mid-20s. That’s thirteen years of living in a body I didn’t want, trying to work out what I was supposedly doing wrong. Once weight is on, the human body does not like giving it back. Anyone who says otherwise is full of sh*t.

So yes — GLP-1s can be life-changing.

But…

There’s a quieter issue sitting in the background. One that rarely makes the headlines and doesn’t make for good clickbait.

Muscle loss.

Weight loss isn’t the same as getting healthier, and it doesn’t correlate with getting stronger.

GLP-1s are extremely good at helping people to eat less.

Unfortunately, the body isn’t particularly selective about what it loses when calories suddenly drop.

Fat?
Muscle?

From your bodies perspective, both are fair game.

When weight loss happens quickly — especially without resistance training — muscle mass goes with it. And this isn’t some minor, technical detail for you to worry about once you hit your target BMI. It’s something you need to plan for before you start losing weight.

• Your muscle supports your joints

• Your muscle protects your spine

• It keeps you mobile, stable, and pain-free

• It keeps your metabolism ticking over

• It let’s you get up off the floor without having to have an out of body experience

Lose too much of it and, yes, the scale looks brilliant… but everything else quietly starts falling apart.

And let’s be honest — because aesthetics do matter to people — most people don’t picture their ‘after’ photo as them looking like a deflated bouncy castle that’s lost the will to live.

Smaller doesn’t automatically mean better.

I’ve seen this play out before.

Long before GLP-1s were widely used, I worked with two clients who had both undergone gastric band surgery.

On paper?
Huge weight loss.
BMI down.
Medical success. Tick.

In real life?

Both lost a significant amount of muscle.
Both developed chronic, debilitating lower back pain.
Both became afraid of movement.
Both struggled with everyday tasks they never imagined would feel difficult.

One of them said something that stuck with me:

“I feel lighter… but I feel weaker in every way.”

Neither of them had been guided towards structured strength training during their weight loss. No plan. No progression. No focus on preserving the body that still had to function for them. All of those sporty things they had dreamed of doing once they got to a ‘healthy’ BMI ? Still out of reach – even more so in fact.

One client fought like hell. Slowly rebuilt her strength. Then her confidence. Then her fitness. She now runs marathons and is stronger than she’s ever been. She has fully embraced being strong, fit and healthy. But it took far longer than it would have, had the issue of muscle loss been addressed pre-surgery. A lot of the damage could have been avoided entirely.

The other client was so disillusioned with the pain she was in, and the body she had ended up with, that there was nothing I could do to convince her that she could come back from it. She quit after a few sessions and I didn’t hear from her again. I hope she’s OK.

Not everyone has the energy — physical or emotional — to fight twice.

That’s why I’m so vocal about this now.

Because I don’t want to see the same thing happen with GLP-1 users.

GLP-1s change appetite but they don’t tell your body to hang on to muscle.

That message comes from one place only: resistance training.

Not endless cardio.
Not “staying active”.
Not the occasional Body Pump class when motivation sporadically shows its face

Structured, progressive strength training — carried out in a way that respects energy levels, recovery and reality

This doesn’t mean smashing yourself five days a week at the gym.
It doesn’t mean bodybuilding like Ronnie Coleman.
It doesn’t mean doing anything extreme.

It means sending your body a clear message:

“This muscle tissue is needed. Don’t get rid of it.”

And when that message is consistent, the body listens — even in a calorie deficit.

Why this matters to doctors as much as patients

If you’re prescribing GLP-1s, you’re helping people to lose weight — and that’s incredibly valuable.

But without a parallel plan to preserve muscle, you may also be setting some patients up for:

• increased injury risk

• joint and back pain

• reduced functional capacity

• poorer long-term outcomes

• weight regain driven by a slower metabolism

Weight loss should improve quality of life — not trade one set of problems for another.

The goal isn’t just a lighter body.
It’s a more capable one.

This is where coaching matters.

Most people using GLP-1s don’t need more motivation.
They don’t need to be told to “train harder.”

In fact, many are quietly excited to see what their body can do as it gets lighter — they just don’t want to break it in the process.

The key is:

• A realistic, well-balanced training plan that preserves muscle without flat lining already limited energy.

• Reassurance that intensity and volume of training is enough to get results -without being too much.

• Having someone who understands that energy peaks and troughs are common with GLP-1s, and that some days the tank is half empty whether you like it or not.

• Someone to help navigate any past injuries or movement dysfunction.

• Someone who can help plan pre- and post-workout nutrition when appetite is suppressed and the idea of “increasing protein intake” makes you want to lie down and have a little cry.

If you’re completely new to training it also means proper coaching on the basics. Technique. Core and glute strength. Breathing. Building a body that feels stable and confident before anything more adventurous happens.

That’s exactly how I work with clients in this position.

Training plans are built to preserve muscle, protect joints, and restore confidence in movement — not drain already-limited energy.

No judgement.
No ego.
No nonsense.

Just intelligent, progressive strength training that works with the medication, not against it.

If this resonates…

If you’re using a GLP-1 and quietly worried about feeling weaker…
If you’re a doctor who wants better long-term outcomes for patients…
If you’ve lost weight before and don’t want to repeat the same mistakes…

This is a conversation worth having.

Drop me a message.

Because losing weight is only part of the story.

Keeping your body strong enough to enjoy it is the bit that really matters.