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Jonathan Ross, personal trainer; owner, Aion Fitness, Bowie, Md.
Petra Kolber, spokeswoman, the IDEA Health and Fitness Association; contributing editor, Health magazine.
American College of Sports Medicine: "Physical Acitvity and Public Health Guidelines."
Kathleen M. Zelman, MPH, RD, LD Director of Nutrition, WebMD.
Reviewed by Ross Brakeville, DPT on February 24, 2016
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