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 stepping into outdoor cold plunge tub at dawn, heart rate spike moment

Jul 11, 2026
by SweatDecks

Cold plunge heart rate spike: what's normal and when to worry

Heart rate can jump 30 to 50 bpm in the first 30 seconds of a cold plunge. Learn what's normal, what triggers the spike, and when it's a red flag.

Read: Cold plunge heart rate spike: what's normal and when to worry

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

Person emerging from outdoor cold plunge tub at dawn with steam rising from skin

Jul 10, 2026
by SweatDecks

Cold plunge and dopamine: how long does the spike actually last?

Cold water immersion raises dopamine by up to 250% and the effect lasts 2-4 hours. Here's what the research says and why it matters.

Read: Cold plunge and dopamine: how long does the spike actually last?