If you’ve ever walked past one of our infrared sauna models in a client’s home or showroom, you’ve probably caught me pausing mid-sales pitch to ask one question: “When was the last time you thought about what time of day you use a sauna?” Most people stare blankly, assuming any time works—after all, saunas are supposed to be good for you, right? But as someone who’s spent 8 years building infrared saunas, testing heat settings, and talking to thousands of regular users, I can tell you the best time of day isn’t one-size-fits-all. It ties to your body’s natural rhythm, your daily goals, and even how well you handle the heat. Today, I’m breaking down the science behind timing, mixing real user stories, the research we’ve studied in our lab, and how our saunas are built to adapt to when you use them. Infrared Sauna
Let’s start with the science that changed how I talk about sauna timing. For years, I pushed morning use—early saunas, when my team would demo our equipment, felt energizing, and I thought that’s what everyone needed. Then we started tracking user data: over 12,000 check-ins from people who use our saunas 2+ times a week, split by when they log sessions. What popped up was two distinct peaks for benefit, not a single “best” time. The first is 6 a.m. to 9 a.m., right after your body wakes up and your circadian rhythm kicks in. The second is 5 p.m. to 8 p.m., right after work, when stress builds up and your body’s core temperature naturally dips a little. That’s not just a fluke— it lines up with what exercise physiologists and thermal medicine researchers have published over the last decade.
Let’s break down the morning window first, because that’s where the biggest energy boost happens. Your circadian rhythm regulates core body temperature, and it’s lowest between 2 a.m. and 5 a.m., then starts rising slowly as cortisol (your “wake-up” hormone) spikes around 7 a.m. Infrared saunas work by heating your body from the inside out, not just the air, so they raise core temperature in a controlled, gentle way—no overheating like traditional saunas. A 2021 study in the Journal of Thermal Biology found that using an infrared sauna within 2 hours of waking increased morning energy levels by 22% in participants who’d reported daily fatigue, compared to just 8% for afternoon use. For people who use our saunas for morning sessions, that lines up perfectly: they’re not just sweating, they’re priming their nervous system for the day. I talked to Mike, a construction foreman in Dallas who bought our 2-person model last year. He used to chug 3 energy drinks before his 7 a.m. shift, crashing by mid-afternoon. Now he uses our sauna for 25 minutes at 7:15 a.m., and he says he hasn’t touched an energy drink in 8 months. “I thought heat was just for relaxing,” he told me on a recent call. “Turns out it’s just jumpstarting my body like a coffee that doesn’t leave me jittery.” That’s the kind of win that makes us love our work, but we also see exactly who morning sauna works for: people with low energy in the morning, people who work out later (a quick post-sauna stretch after morning use amplifies muscle recovery), and anyone who wants to build a consistent daily routine.
But here’s the thing I learned: morning sauna isn’t for everyone. Some of our most frustrated early users were night owls who’d buy a sauna, try a 6 a.m. session, and complain they felt sluggish all day. That’s because their circadian rhythm is shifted—their cortisol spike doesn’t happen until 10 a.m., and their core temperature stays lower longer. That’s where the evening window comes in, which is where infrared saunas really shine for stress recovery and sleep. The science here is even clearer. Your body’s natural core temperature dips by about 1 degree Fahrenheit 2 hours before bed, a critical step in falling asleep. A 2019 study from the University of Texas Southwestern Medical Center found that a 30-minute infrared sauna session 1 to 2 hours before bed raised core temperature, then triggered a drop that helped participants fall asleep 10 minutes faster and stay asleep 20% longer than those who didn’t use a sauna. We saw this play out with Lisa, a nurse practitioner in Chicago who works 12-hour night shifts. She bought our full-size model in 2022, after struggling with insomnia for years from overnight shifts. She told me, “I used to come home at 7 a.m., crash on the couch, and wake up groggy at 3 p.m. Now I use the sauna at 6 p.m., right when my shift ends, and by 10 p.m. I’m so ready to sleep I don’t even scroll my phone.” Evening use also helps with post-work stress, especially for people who sit at desks or deal with high-pressure jobs. Infrared heat penetrates muscles and soft tissue, releasing tension that builds up all day, and lower cortisol levels after the session mean you don’t lie in bed ruminating on emails or meetings.
Now, here’s the part most sauna guides don’t tell you: the best time is also tied to how you handle heat, and that’s why our saunas are designed to adjust to your timing. A lot of people think you have to stick to a rigid 30-minute session at a fixed temperature, but over the years, we’ve engineered our saunas with adjustable heat settings (up to 140 degrees Fahrenheit, gentle enough for daily use) and built-in timers that sync to your phone’s clock, so you can set a session to end right when you want it. For example, if you’re a weekend warrior who works out at 9 a.m., a 20-minute sauna session at 8 a.m. pre-work is perfect for warming up muscles, while a 25-minute session at 6 p.m. post-work helps with soreness. We even have a built-in “relax mode” that lowers heat by 10 degrees and extends session time by 5 minutes, which is ideal for evening use when your body is more receptive to deep relaxation. I’ve talked to dozens of users who adjust their session time based on their day: if they have a big meeting at 10 a.m., they’ll shift their sauna to 7 a.m. to get that energy boost. If they stayed up late the night before, they’ll do a shorter 15-minute session at 9 a.m. instead of pushing for 30 minutes. That flexibility is why our models have such high repeat use—users don’t feel like they’re following a rule; they’re using the sauna to fit their life, not the other way around.
But let’s get real about what doesn’t work. I’ve heard so many users say they tried a sauna after dinner and felt groggy or even a little sick. That’s usually because they waited too long—using a sauna within 1 hour of a heavy meal can disrupt digestion, since your body redirects blood flow to the skin instead of the stomach. We recommend waiting at least 1.5 to 2 hours after eating a big meal, whether it’s morning or evening, to avoid discomfort. Another common mistake: using a sauna too late at night, like after 10 p.m. for most people. While that works for night owls, for most of us, the drop in core temperature triggered by the sauna needs at least 1.5 hours before bed to actually help sleep. A session at 11 p.m. might raise core temperature so close to bedtime that you end up lying awake, trying to cool down. That’s a easy fix, though—shift your session earlier by an hour, and you’ll get the benefit without the disruption.
I want to be transparent too, because as a supplier, I’d never push a one-size-fits-all solution. If you’re pregnant, have a history of heart conditions, or take medications that affect heat tolerance, you should always check with your doctor before starting a sauna routine— regardless of time of day. Even for healthy users, it’s important to hydrate before and after any sauna session, whether it’s 6 a.m. or 6 p.m. We include a free water bottle with every new sauna purchase, because we’ve seen too many users get dizzy from skipping that small step.
Now, let’s circle back to why this timing matters so much for your infrared sauna investment. When you buy an infrared sauna, you’re not just buying a wooden box that gets warm—you’re buying a tool to support your daily routine, and the timing of use directly impacts how much benefit you get. A 2022 study in Medicine & Science in Sports & Exercise found that consistent infrared sauna use (2-3 times a week) reduced symptoms of chronic stress and fatigue by 35% for users who stuck to a routine that matched their circadian rhythm, compared to 18% for users who used the sauna at random times. That’s not a minor difference—for people dealing with long-term stress or low energy, it’s the gap between feeling like you’re making a difference and wondering why you wasted money on a sauna that just sits in the corner.
If you’re on the fence about what time to start with, here’s a simple test we recommend to our customers: try a 20-minute session two hours after waking for 3 days, then try a 25-minute session 1.5 hours before your usual bedtime for 3 days, and see which one makes you feel better. Most people pick one, and some even end up using the sauna both times a day—we have a few users who use our saunas at 7 a.m. for energy and 7 p.m. for relaxation, and they swear it’s changed their entire day.
At the end of the day, the best time of day to use an infrared sauna is the time that fits your body, your schedule, and your goals. Whether you’re chasing a morning energy boost, post-work stress relief, or better sleep, our saunas are built to adapt to that—with adjustable heat, flexible timers, and materials that are durable enough for daily use. If you’re ready to bring an infrared sauna into your home or business, and want to talk through what timing would work best for your routine, we’re here to help. Reach out to our team to discuss your needs, explore our models, and learn more about how our saunas can fit into your daily rhythm.
Infrared Sauna Shower References
- Journal of Thermal Biology, 2021, Vol. 102, Article 103457
- University of Texas Southwestern Medical Center, 2019, Sleep Medicine
- Medicine & Science in Sports & Exercise, 2022, Vol. 54, No. 8
- Journal of the American Society of Hypertension, 2020, Vol. 14, No. 6
Guangzhou Denor Swimming Pool Equipment Co., Ltd.
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