Researchers at the University of Ottawa discovered that cold water swimming can quickly improve cellular protection, reducing stress response and potentially slowing down aging. In a study involving 10 healthy young male adults, daily cold water dips for an hour reduced signs of apoptosis (programmed cell death) and inflammation, while increasing autophagy, a healthy cell recycling process. The findings suggest that consistent cold exposure may help the body adapt to environmental stress and improve cellular protection, potentially preventing diseases and promoting longevity.
Source: https://www.sciencealert.com/a-week-of-swimming-in-cold-water-can-change-you-on-a-cellular-level