Does Running in the Heat Burn More Calories?

You may have heard that exercising outside when it’s hot will burn you more calorie. But is this true?

Unfortunately, the experts don’t have a precise answer. The best they can say is “possibly.” According to Dr. Preethi Daniel, Clinical Director at London Doctors Clinics, it depends on your basal metabolic rate. Basal metabolic rate is “the amount of energy we expend per unit time at rest or a measure of how quickly you break down fuels (calories) to keep your cells running,” she explains.

While BMR varies with activity levels, it’s also influenced by the weather and climate, at least in theory. “Warmer weather may cause a slight increase in the basal metabolic rate, helping you burn those calories a little bit faster because the body is working extra hard to keep you cool,” Dr. Preethi Daniel says.