Drinking cold water during your workout can keep your body temperature cooler for longer, decreasing heat-related stress and fatigue, according to a new study published in The Journal of the International Society of Sports Nutrition [jissn.com].
Researchers at Athletes’ Performance studied 45 men who completed two 60-minute training sessions, which were followed by training tests including a broad jump test and a bicycle exhaustion test. During training, they drank either cold water from a Thermos® stainless steel water bottle with vacuum insulation technology or room temperature water. Core temperature was measured every 15 minutes during training.
They found that when the men drank cold water (40ºF), the rise in body temperature was delayed by at least 30 minutes compared to 15 minutes when they drank room temperature water (72ºF).