Then, in September, the Trump Administration launched a crackdown on deceptive direct-to-consumer drug advertising, resulting in the FDA publishing over 55 warning letters to online sellers of compounded versions of GLP-1 medications that called for the removal of false and misleading promotional statements, claims of clinically proven weight-loss treatments, and using the words FDA-approved in advertising copy
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104, 13251332.10.1104/pp.104.4.1325 27 KlapheckS.SchlunzS.BergmannL
That is the mechanistic case for the blend in one paragraph and it is exactly why the two are described as complementary rather than redundant

Normal fatigue on GLP-1 medication: Feeling moderately tired after training but recovering within 24 to 48 hours Slight strength reduction (5 to 10 percent) during the first month that stabilizes Mild muscle soreness that resolves within 48 hours Energy that improves after the first 4 to 6 weeks as your body adapts Warning signs that require adjustment: Strength declining consistently over multiple weeks Muscle soreness persisting beyond 72 hours after a session Feeling exhausted before training even begins Frequent illness, joint pain, or mood changes Sleep quality worsening despite good sleep hygiene Loss of motivation that extends beyond the gym If youre experiencing three or more warning signs, reduce training volume by another 20 percent, add a rest day, audit your calorie and protein intake, and consult with both your prescribing physician and a qualified trainer