Do You Burn More Calories Running in the Heat?

When Exercising in the Heat Can (and Can't) Burn More Calories

How does temperature affect calories burned? Well, when you're exercising or running in hot weather, your cardiovascular system has to work overtime to keep your core body temperature from shooting up too high, says Dennis Cardone, DO, a sports medicine physician at NYU Langone Health. Any time your body has to work harder, you burn more calories.

So, does working out in the heat burn more calories?

The bottom line of the "do you burn more calories when it's hot" debate is maybe, but it's likely not enough to make a real impact in your weight-loss results. And it's definitely not worth making yourself miserable or pushing yourself toward heat-related illnesses.

Warning

Always listen to your body and stop exercising in the heat if you feel any nausea or dizziness or have pale or cold skin with goosebumps. These are all possible signs of heat exhaustion, according to the Mayo Clinic.

4 Must-Follow Tips for Working Out in the Heat

Higher calorie burn or not, there's a good chance you plan on continuing your fitness routine during the warmer months of the year. With that in mind, here some safety tips to consider when running or exercising in the heat:

1. Hydrate

When you exercise in hot conditions, you're going to sweat. That's why the Academy of Nutrition and Dietetics suggests weighing yourself before and after activity to see how much water weight you lost through sweating.

FYI, to prevent dehydration, your goal is to drink enough during your workout that you don't lose any weight between your warm-up and cool-down.

But if you do, the academy recommends drinking 2 to 3 cups of water for each pound of weight you've lost.

Warning

Signs of dehydration include headache, confusion, fatigue, lightheadedness, chills and dark-colored urine, according to the Cleveland Clinic. Stop exercising and hydrate if you experience these symptoms.

2. Dress for the Weather

Sweat-wicking clothing can help your body more efficiently cool itself by allowing the sweat on your skin to evaporate.

Choose light-colored options whenever possible, since they'll help reflect, rather than absorb, rays from the beating-down sun.

Sweat-Wicking Workout Clothes We Love

  • Smartwool Run Targeted Cushion Low Ankle Socks ($18, Smartwool.com)
  • Lululemon Track That Mid-Rise Lined Shorts ($68, Lululemon.com)
  • Tracksmith Session Shorts ($68, Tracksmith.com)
  • Brooks Dare Crisscross Run Bra ($33, Brooksrunning.com)
  • Patagonia Capilene Cool Daily Shirt ($35, REI.com)
  • Under Armour Tech 2.0 Short- Sleeve T-Shirt ($20, Amazon.com)

3. Set Your Schedule

If you can, do any outdoor exercises in the early morning or later at night when the temperatures have cooled down.

If you're working out in a gym with air conditioning, the time of day is not as critical. Just make sure to hydrate before, during and after physical activity.

4. Give Your Body Time to Adjust

When planning any physical activity during the hotter months, stick to short, low-intensity workouts, at least in the beginning. This will help your body get used to the warmer weather, per the Cleveland Clinic.