GLP Fitness← Back to homeThe trainer that remembers.
LeanSync exists because the new class of weight-loss drugs works — and most people lose muscle anyway, quietly, and only notice when the drug stops.
Why we built this
GLP-1 medications like semaglutide and tirzepatide are a genuine pharmacological breakthrough. They also erase a surprising amount of lean mass — up to 40% of total weight lost, in unsupervised cohorts. When people stop the drug, the fat returns. The muscle doesn’t. Net composition is worse than before.
LeanSync is the only program we know of designed specifically for this problem. Not a fitness app retrofitted with a GLP-1 badge. Not an AI trainer. A muscle-preservation system that adapts to your injection cycle, your appetite, and what your body actually did this week.
How it’s built
- Rules engine runs the daily loop — never an LLM on its own.
- Certified trainers review your week and handle anything the system flags.
- Strength retention is the primary KPI — the scale is a by-product.
- SMS-first. No app to open. Two-minute check-ins. Your plan, built for today.
What’s next
We’re in private beta with Founding-50 members. Public launch is near. If you want to be first, join the waitlist from the home page.