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 ...

Immersion in cold water is definitely an activity that divides people – some love it others hate it. But many now practice it weekly or even daily in the belief that it’s good for their mental and ...

Sign up for CNN’s Fitness, But Better newsletter series. Our seven-part guide will help you ease into a healthy routine, backed by experts. A systematic review of ...

Caroline Thomason is a media dietitian in the greater Washington, D.C. area. She writes for top-tier media outlets, partners with brands as a nutrition expert and runs a nutrition private practice. In ...