Home sauna questions, answered
Adding heat to your cold practice is the highest-leverage upgrade you can make. These are the sauna questions we hear most often.
What's the difference between infrared and traditional sauna? ▸
Traditional saunas heat the air (150-200°F), which then heats your body through convection. Infrared saunas use infrared radiation (120-150°F air temp) to heat your body directly through radiation. Infrared penetrates about 1.5 inches into tissue, delivering deeper muscular benefit at lower air temperatures. Both deliver similar cardiovascular benefits.
How hot should my home sauna be? ▸
Infrared blankets and tents: 140-160°F is the sweet spot. Infrared domes: 160-175°F. Traditional Finnish saunas: 170-190°F. Beginners should start at the low end of each range and work up over 2-3 weeks. Higher temperatures don't necessarily mean more benefit — the 140-160°F range delivers most benefits with less heat stress.
Can I use a sauna every day? ▸
Yes, daily sauna use is generally safe for healthy adults at moderate temperatures (140-160°F for 15-20 min). Finnish research shows cardiovascular benefits peak at 4-7 sessions per week. If you're doing contrast therapy (sauna + cold plunge), limit to 2-3 sessions per week due to the higher vascular load.
Should I sauna before or after cold plunge? ▸
Both work, but most contrast therapy protocols start with heat. The reason: heat dilates blood vessels and warms your core, making the subsequent cold plunge more comfortable (your body has thermal reserve). Starting with cold constricts vessels and cools your core, which can make the subsequent sauna feel oppressively hot. For most people: sauna first, plunge second, end on cold.
Do infrared sauna blankets emit EMF? ▸
All electrical devices emit some electromagnetic fields. Quality infrared sauna blankets (HigherDose) use low-EMF carbon fiber heating elements and shield the wiring to keep EMF readings under 2 milligauss at the body surface. Cheaper unbranded blankets may emit 10+ milligauss. If you're EMF-sensitive, stick with brands that publish their EMF readings.
How long should I stay in a sauna? ▸
Beginners: 10-15 minutes. Intermediate: 15-25 minutes. Advanced: 25-30 minutes. Don't exceed 30 minutes in a single session — heat exhaustion risk rises sharply. If you feel dizzy, nauseous, or get a headache, exit immediately. For contrast therapy, 15-20 minute sauna sessions are standard.
Can I use a sauna while pregnant? ▸
Generally no — sauna use during pregnancy is contraindicated, especially in the first trimester. Elevated core body temperature above 101°F has been linked to neural tube defects. Some OBs allow brief (under 10 min) infrared sauna use at low temperatures (under 130°F) in the third trimester, but this requires specific physician clearance. When in doubt, skip the sauna while pregnant.
Should I drink water during sauna? ▸
Yes, aggressively. Sauna use can sweat out 1-2 lbs of water per 30-minute session. Drink 24oz of water before, during (if possible), and after. For sessions over 20 minutes, add electrolytes (sodium, potassium, magnesium) to replace what you sweat out. Dehydration is the #1 cause of sauna-related dizziness and nausea.
What's the best home sauna for under $300? ▸
The SereneLife Portable Infrared Sauna ($269) is the best value under $300 — includes a folding chair, heated foot pad, remote control, and the tent itself. Heats to 140°F in about 5 minutes. See our blanket vs tent comparison for alternatives.
Do saunas help with weight loss? ▸
Indirectly, yes — a 30-min infrared sauna session burns about 300-600 calories via elevated heart rate and sweat production. But this is not a substitute for diet and exercise. The main weight loss benefit of sauna is improved recovery from workouts (which lets you train harder and more often). Direct fat loss from sauna use is minimal.