Muscle Loss on GLP-1

Every number on GLP-1 weight loss, lean mass and regain, each one linked to its primary source — and the strength work that protects muscle while the scale moves. Start with the statistics guide, then the starter plan for lifting after a GLP-1.

Start with: GLP-1, Muscle and Weight Regain: The Numbers

Guides

• GuideGLP-1, Muscle and Weight Regain: The Numbers

  Every key number on GLP-1 weight loss, lean mass, regain and retention — each one linked to its primary source, with the caveats the marketing leaves out.

  September 7, 2026

Reviews

• Evidence ReviewOld School New Body Review: F4X vs. the Evidence

  We read the F4X protocol against the resistance-training evidence for women over 40 — what lines up, what the marketing oversells, and who the $20 is for.

  September 21, 2026