Don't Love the Stairmaster: Try Passive Cardio with Infrared Sauna with Connie Zack

If you've ever dismissed a sauna as a spa luxury, this episode will change your mind. In this episode, Connie Zack, co-founder of Sunlighten, breaks down how infrared light interacts with the body at the cellular level — and why it's genuinely different from just getting hot. Connie covers all four wavelengths, the SoloCarbon blood pressure trials, why deliberately exposing yourself to heat can actually reduce hot flash frequency, how infrared shifts you from sympathetic to parasympathetic in minutes, and the full case for sauna as passive cardio. She also gets into the practical stuff: minimum effective dose, habit stacking, morning vs. evening, hydration, and what to expect in week one versus week 100. Don’t forget to go to https://get.sunlighten.com/DRSTEPHANIE and use code DRSTEPHANIE for a special offer. 🎤 EPISODE OVERVIEW: (0:00) Intro/Teaser (1:19) Week 1 vs. Week 100 — how to start your sauna practice (6:33) Contrast therapy & cold plunge benefits (9:08) The biggest misconception about infrared saunas (12:01) The four wavelengths explained: far, mid, near & red (18:31) The most underestimated benefit for midlife women (23:03) How infrared works at the cellular level (28:16) SoloCarbon technology & the blood pressure studies (31:40) Hot flashes & thermoregulatory training (38:49) Passive cardio — the mechanism explained (43:40) Cortisol, HPA axis & the sympathetic-to-parasympathetic shift (45:33) Minimum effective dose & what you'll notice first (57:08) Habit stacking your sauna practice (1:02:47) Can't afford a Sunlighten? Free alternatives (1:08:10) The After-Party with Dr. Stephanie 📎 RESOURCES MENTIONED: https://drstephanieestima.com/podcasts/ep477 🎁 OUR AWESOME SPONSORS: JUST THRIVE HEALTH Your gut runs the show — mood, immunity, energy, all of it. Just Thrive's spore-based probiotics are the ones I actually trust. Take the Feel Better Challenge and save 20% on your first order at https://justthrivehealth.com/better with code BETTER. LMNT We talked about electrolytes in this episode for a reason — they matter. LMNT is what I reach for: no sugar, no food dye, no questionable fillers. Just the minerals your body actually needs. Get a special offer at https://drinklmnt.com/better TROSCRIPTIONS Troscriptions are precision-dosed, physician-formulated, and genuinely unlike anything else in the optimization space. Try them at https://troscriptions.com/better and use code BETTER for 10% off your first order. BON CHARGE Recover Faster. Sleep Deeper. Look Better. Bon Charge brings you science-backed wellness technologies to enhance sleep, recovery, and beauty. Get 15% off the full suite at https://boncharge.com/better with code BETTER. ****************************P.S. When you're ready, here are two ways Dr. Stephanie can help you:Subscribe: The Mini Pause — My weekly newsletter packed with the most actionable, evidence-based tools for women 40+ to thrive in midlife.Build Muscle: LIFT — My progressive strength training program designed for women in midlife. Form-focused, joint-friendly, and built for real results. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.