Cold-water immersion may negatively impact muscle growth by blunting pro-inflammatory responses and restricting circulation.

“people who pick at Cold plunging they're like well it blocks hypertrophy okay yeah okay that's true so in the six hours after you're trying to get your you know a little more Peak on your biceps or something it's going to block that”

“it may you know reduce muscle growth temporarily uh or muscle gains it may reduce inflammation in some people um you know and you may help with like energy levels a bit of anxiety in some people or depression or Focus kind of States”

“the primary reasons that cold-water immersion seems to have negative effects, number one, blunting of the pro-inflammatory response, number two, blunting of the circulatory response, that cold water restricts the circulation and, thus, you're not getting nutrient delivery to the muscles. It's speculative but that's the work in theory.”