If you've ever had diarrhea, sore nipples, rashes, or other embarrassing issues while running and you thought you were the only one, don't worry, you're not alone. Most runners have had to deal with their share of embarrassing running-related problems. But they're often too embarrassed to ask their running friends, coach, or doctor what to do.

Over the years, as a runner and coach, I've personally experienced and heard stories about all kinds of embarrassing situations. So here are answers to questions about the most common embarrassing and sensitive topics for runners.

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Although you've probably seen energy drinks such as Red Bull being promoted at athletic events, or you've witnessed professional athletes drinking them, high-caffeine energy drinks don't go well with exercise. Drinking an energy drink before or during exercise is not the same as consuming a sports drink, like Gatorade. For starters, sports drinks usually don't contain caffeine. The caffeine in energy drinks will not only make you lose more fluids through urine, but it can also have a laxative effect.

Walking Guide Wendy discusses more of the reasons why you shouldn't drink energy drinks before or during exercise.

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