cold immersion: person swims, frozen lake, winter therapy, body rejuvenation, immune system boost, health focus

recovery immunity ice wellness resistance freezing hardening circulation strength adaptation temperature vigor fortification vitality practice therapy swimming immersion revitalization detoxification cold chill rejuvenation winter water balance renewal exposure relaxation person toughness lake body discipline health bathing purification shock healing nature refreshment strengthening energy fitness resilience endurance stamina frost invigoration ai generated