Fitness Coach

Why Do I Get Sick After Endurance Events (and How Can I Avoid It)?

Why Do I Get Sick After Endurance Events (and How Can I Avoid It)?

You're not just imagining things: Doctors often refer to the 72 hours after an intense fitness event (like a marathon, ultra, or long-distance triathlon) as the "open window" for infection, says Nate Jones, MD, sports medicine physician at Loyola University Medical Center. And yes, you're more likely to get sick during this time—especially if you don't take precautions. Here's why, and what you can do about it.

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