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Based on recent research published in , a study on winter swimming identified a specific physiological phenomenon where participants experienced a distinct peak in skin temperature at 4:30–5:30 a.m. [10]. This finding is part of a broader report on how thermal acclimation—specifically the combination of cold-water dips and saunas—affects human metabolism and brown adipose tissue (BAT) [10]. Key Findings: Physiological Peaks & Thermoregulation night high 4
Night High 4