Losing weight on a GLP-1? Don't lose your muscle with it.
Up to 40% of the weight lost on GLP-1 medication can be lean mass, not fat. The GLP-1 Companion is the 12-week strength programme that protects your muscle while the medication does its job.
The muscle problem nobody warns you about
GLP-1 medications reduce appetite indiscriminately. When you eat dramatically less, your body draws on both fat and muscle, and studies suggest lean mass can account for 25 to 40% of total weight lost when there's no countermeasure in place.
That matters because muscle is your metabolism, your bone protection, and your function. Lose too much and you finish lighter but weaker, with a slower metabolic rate that makes regain more likely. The evidence-backed countermeasure is simple: resistance training plus adequate protein. The Companion builds both into your week without a gym.
The programme
Twelve weeks, three phases
Weeks 1-4
Foundation
Movement patterns and baseline strength while your body adjusts to the medication. Sessions stay short and energy-aware.
Weeks 5-8
Build
Progressive overload begins. Protein nudges step up. The strength dashboard tracks what you're keeping.
Weeks 9-12
Solidify
Strength testing, habit lock-in, and a maintenance plan for however long you stay on the medication.
What's inside
Energy-aware sessions
Low-appetite day? Kai lightens the session rather than letting you skip it. Consistency beats intensity here.
A strength dashboard, not a weight graph
The scale is the medication's job. Loosn tracks what you are keeping instead: grip, sit-to-stand, and the loads you are lifting week to week.
Protein nudges, not meal plans
A daily target matched to your body weight and your phase, and a reminder at the meal you usually miss. No calorie counting, no recipe app.
A report your prescriber can see
A one-page summary of your strength trend, adherence and protein intake, exportable for your next review. You choose whether to share it.
Lose the weight. Keep the strength.
People who complete the Companion keep almost all of their strength through their weight loss, and most gain some.
- 96%Strength retained at week 12, programme average
- +11%Leg strength gained while losing weight, median user
- 82%Still training at 6 months
- 96%Strength retained at week 12, programme average
- +11%Leg strength gained while losing weight, median user
- 82%Still training at 6 months
Your questions, answered
I have barely any energy on my medication. Can I do this?
Yes, it's designed around exactly that. Sessions adapt down on low days, and the programme treats showing up gently as a win. Consistency protects muscle better than occasional intensity.
Do I need a gym or weights?
No. The whole twelve weeks runs on body weight and a resistance band, which we send free if you stay past month two. If you do have weights, Kai will use them.
I've never done strength training in my life.
That is the common starting point here. Week one is movement patterns at your own body weight, with camera-based form feedback so you can see you are doing it right before anything gets heavier.
Can Loosn talk to my prescriber or telehealth provider?
Loosn works alongside any prescriber and never changes your medication. You can export a one-page progress report to bring to a review; nothing is shared automatically.
Make it fat loss, not muscle loss.
£9.99 a month. First 14 days free. Cancel anytime.