Deliberate Cold Exposure: Real Jolt, Oversold Hack

Summary

Cold plunges and cold showers (~7–15°C, 30 seconds to a few minutes) are a genuine acute hormetic stressor with a robust noradrenaline surge and a reliable post-immersion "alertness" lift — but the headline claims are mostly overstated: the strongest, most replicated finding actually cuts *against* a common use case (cold immersion right after lifting modestly blunts muscle growth), the "250% dopamine for 2–3 hours" figure is **misattributed** to a study that found no significant dopamine rise, and mood, fat-loss, and recovery benefits are thin, short-term, or backwards. Real tool for transien