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How weather impacts runners in the AJC Peachtree Road Race

Heat and humidity play a huge impact on race day

ATLANTA — You’ve been training for weeks or even months for the AJC Peachtree Road Race. But come race day, weather can either make for a smooth sprint to the finish line or can be a big hurdle.

That hurdle isn't often rain or storms, but a forecast for high heat and humidity. This is because it impacts your body's ability to keep its core temperature regulated.

When you run, your core body temperature rises. In response, your sweat glands produce droplets that carry excess heat to your skin. In other words, you sweat. That sweat evaporates, which in turn helps to keep your body cool. 

Credit: WXIA

RELATED: Everything you need to know when taking MARTA to the AJC Peachtree Road Race

But when the humidity rises, this process doesn’t happen as quickly. It takes longer for the sweat to evaporate, and therefore the heat stays put. Your body can’t cool itself as effectively.

Credit: wxia

RELATED: Your guide to the 52nd running of the AJC Peachtree Road Race

This added humidity, especially on a warm Georgia summer morning, can make running more of a challenge.

On race day, there’s an alert system to keep runners aware of these race-affecting weather conditions.

Credit: WXIA

Green means good. Yellow means use caution and be aware of changing conditions. When it turns red, it’s potentially dangerous… sometimes leading to earlier start times in years past. In the most extremes, the race would be cancelled.

The best way to overcome a humid race morning? Hydrate frequently and in advance and don’t over-exert yourself.

Luckily, this year the weather will play in your favor low humidity arriving just in time for the holiday weekend.

Credit: WXIA

RELATED: This is what's different at the AJC Peachtree Road Race this year

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