Kim Porter began her career as a writer and an editor focusing on personal finance in 2010. Since then, her work has been published everywhere from Forbes Advisor to U.S. News & World Report, Fortune, ...

Your body's first reaction to a plunge in chilly water is the "cold shock" response. Your heart rate jumps. Stress hormones spike. You gasp suddenly, and may hyperventilate. Your reward if you stay in ...