Winter swimmers who stay in the water for one to two minutes experience activation of the parasympathetic nervous system.

“one minute or so I'm I can't be precise on that because I maybe also varies a bit in in humans so one to two minutes you will have full activation of the sympathetic nervous system but also the Paras sympatic nervous system um and that's going to activate for example something like serotonin in your brain which is like also good for mental balance and people feeling in mental balance afterwards they after they go up so that is like measured on a questionnaires and also measured like on on anecdotes of course people tell all the time that they feel good afterwards”