Science Friday

Are Cold Plunges Actually Good For You?

56 snips
Aug 7, 2025
In this engaging discussion, biologist François Haman from the University of Ottawa explores the science behind cold plunges. He examines popular claims about their health benefits, revealing the truth about cold exposure and its effects on the immune system. Haman also discusses the activation of brown fat for calorie burning and the importance of gradual exposure. The conversation shifts to paleontologist Advait Jukar, who analyzes the cultural comeback of mammoths as sports mascots, blending history with modern branding in a delightful way.
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INSIGHT

Cold Plunging: Dangers and Benefits

  • Cold plunging is a strong stress that can cause serious dangers like cardiac arrest and hypothermia.
  • Yet, it also triggers beneficial hormonal releases and psychological effects when done correctly.
INSIGHT

What Cold Plunges Truly Affect

  • Cold plunging releases dopamine and endorphins, creating a feel-good sensation.
  • There is no solid proof it boosts immune function; main benefits are psychological and social.
INSIGHT

Brown Fat and Weight Loss Reality

  • Brown fat burns fats to generate heat but is only activated by cold exposure.
  • The calorie burn from brown fat activation is very minimal, so it won't meaningfully aid weight loss.
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