When you first get in the plunge, your body's first reaction will be to get out; it is an entirely natural instinct. Control your breathing, and within a few seconds, your body will adjust. The benefits of cold plunging can start as early as 1.5 minutes. Our maximum suggested plunge time is 5-6 minutes. Hypothermia can start within 15-20 minutes of cold plunging, so be aware of the time you spend in the plunge.