SweatDecks Blog

Welcome to the SweatDecks wellness journal. Our team of credentialed experts -- including sports medicine physicians, exercise scientists, and master builders -- covers everything from cold plunge protocols and sauna health benefits to installation guides and product comparisons. Whether you're researching your first home sauna or optimizing a contrast therapy routine, you'll find science-backed answers here.

Person transitioning from outdoor sauna to cold plunge tub in morning mist

Jul 10, 2026
by SweatDecks

Contrast therapy and cortisol: what the research actually shows

Does contrast therapy lower cortisol? We break down the real studies, the numbers, and what hot-cold cycling actually does to your stress hormones.

Read: Contrast therapy and cortisol: what the research actually shows

Man at dawn entering outdoor sauna beside cold plunge tub showing cortisol contrast

Jul 10, 2026
by SweatDecks

Cold plunge cortisol spike vs sauna cortisol drop explained

Cold plunges raise cortisol 300-500% briefly; saunas lower it over time. Here's what the research actually says about both, and how to use each smartly.

Read: Cold plunge cortisol spike vs sauna cortisol drop explained

Wooden Finnish sauna interior with steam rising from hot stones at dusk

Jul 10, 2026
by SweatDecks

Sauna and cortisol reduction: what the research actually shows

Studies show sauna use can lower cortisol by 16 to 30% per session. Here's what the research says, what conditions matter, and what's still uncertain.

Read: Sauna and cortisol reduction: what the research actually shows