Is Working Out in the Heat Bad for You?

The myth: Working out in the heat is bad for you.

Sad news for folks (like me) who, at the end of a sweltering day, opt for the bar instead of a run, dismissing exercise in hot weather as downright dangerous.

Assuming the mercury is south of 100 degrees, and that you are not obese and are somewhat fit, go ahead and get out there (or in there, if you’re signed up for an elevated-thermostat boot camp)—albeit with a few caveats.

But first, let’s get a few facts about working out in the heat straight.

First, most heart attacks happen in cold weather, according to the American Heart Association. That’s because frigid temperatures constrict your veins and slow your blood flow; hot weather has the opposite effect.

Next, the handful of high-school football players who sadly die each year during summer practice are, well, not you. Generally the kids who keel over are extremely large (linemen, specifically) and overweight (fat traps heat) and may not be in good overall shape. They may also be wearing heavy equipment, not to mention being screamed at to go harder.

What about those ber-fit marathoners and triathletes who succumb to heat-related illnesses during a race? Well, no one really knows why some are stricken and others aren’t. Which brings us to three important rules for working out in the heat.

(1) If you suddenly feel way off, stop. This is one of the beauties of the human body: It generally tells you when to pull back. Listen to it.

(2) Stay hydrated. Heat makes you sweat more, so replenish often. But, more important, high internal body temperatures and metabolic rates cause heat illness; downing cool H2O cools your engine.

(3) Start off slow. More athletes get heat sickness at the start of hot-weather season, according to the British Journal of Sports Medicine. Put another way, your body needs to acclimate to steamy temps, so up your intensity and workout times gradually.

Heed these rules and get out there— know that heated sweat sessions don’t necessarily spell better workouts. Because heat saps energy, you often can’t push as hard as you can in, say, an air-conditioned gym. So don’t think one hot-weather run equals two days on a treadmill. If you do, you’ll be fat by fall.


A Snap Guide to Eco-Friendly Dream Cars

Sunday, April 22 is Earth Day. Honor our home planet by going green in one of these...

The Last Pair of Aviators You’ll Ever Buy

There are 100 days between March 12 and June 21, the official beginning of our favorite season. So every day between now...

How I Learned Money Management

The last thing any business owner wants to see is a negative bank balance. Here's how the founder of Infographic World...

When You Wish Upon A*

Results day. It’s hard to miss at this time of year – there aren’t...

8 Ways to Battle Burnout

Starting and nurturing your own business takes hard work—and it can be frustrating. How do you fight against working too...



Thanks Steve Jobs, I’m a Mac!

Steve Jobs didn’t just create products, he created consumer identities. Sure, he changed the way we listen...

The 7 Best Things to Eat and Drink After Your Workout

You can do better than a Snickers bar. Hitting the gym is just half...

Good-Looking People Get Sick Less, Study Says

THIS ISN'T JUST another report from the School of Obviousness—it's the result of a decades-long study (published in the Journal of Evolution &...

6 Under-the-Radar Alternatives to Overblown Travel Spots

Because it's still possible to have new, undiscovered travel experiences. The...

Beyond Telling Time: 4 Special Watch Functions That Matter

A guide to the ingenious features known as “complications.” In the era of voice-activated,...