HIIT vs LISS cardio on GLP-1 — looking for input

Just wanted to say — for anyone reading this HIIT vs LISS cardio thread who is feeling discouraged: it gets better. The first few weeks are the hardest. Hang in there. 💪

Want to share my personal experience related to HIIT vs LISS cardio on GLP-1 since I think it might help others in a similar situation.

I started my GLP-1 journey in March 2025 at 289 lbs with metabolic syndrome. My telehealth provider prescribed semaglutide 0.25mg to start.

Now, 18 months later: I am down 69 lbs, my labs have normalized, and my sleep apnea has improved dramatically. The HIIT vs LISS cardio aspect specifically was something that made a big difference in my journey.

This forum was my go-to resource throughout.

Clinical perspective on HIIT vs LISS cardio on GLP-1 looking:

I have managed ~150 patients on GLP-1 therapy and this topic comes up frequently. What the data shows — and what I see in practice — is that the medication works best as part of a comprehensive approach.

For this specific question, I would recommend: getting comprehensive baseline labs first.

Thank you TomTeleRx! This is incredibly helpful. Bookmarking for later. 🙏

Relevant to HIIT vs LISS cardio on GLP-1 — here is my latest bloodwork comparison:

Key improvements: A1C 7.6% → 5.5%, triglycerides 237 → 107 mg/dL, hsCRP 8.0 → 1.3 mg/L. All on tirzepatide for 17 months.

The inflammatory marker drop is what impresses me most. Consistent with the SELECT trial's cardiovascular findings.