Mark Heidelberger has been writing professionally for over 15 years, with some 1,200 published articles to his name, many in the fields of fitness, health, nutrition and outdoor recreation. His work has appeared in USA Today, The Houston Chronicle, Livestrong, WritersWeekly and Outdoor SoCal among others. He currently lives in Los Angeles and is an avid hiker, cyclist and HIIT aficionado.
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