Allison Mankowski, registered dietitian; sports dietitian, Eastern Michigan University.
NBC Sports: “How Many Calories Michael Phelps Consumed as a Swimmer.”
Livestrong: “What Sport Burns the Most Calories Per Hour?”
Men’s Health: “Olympic Swimmer Ryan Murphy Swears by This Breakfast Every Day.”
CNBC: “How the World’s Fastest Man Usain Bolt Mentally Prepares for a Race.”
USA Gymnastics: “Weight Management, Nutrition and Energy Needs for Gymnastics.”
Harvard Health Publishing: “Calories Burned in 30 minutes for People of Three Different Weights.”
Journal of the International Society of Sports Nutrition: “The Risk of Low Energy Availability in Chinese Elite and Recreational Female Aesthetic Sports Athletes.”
Dominique Dawes, three-time Olympian and Olympic gold medalist; owner, Dominique Dawes Gymnastics & Ninja Academy.
Cosmopolitan: “What Olympic Gymnast Gabby Douglas Really Eats in a Day.”
British GQ: “The Real-Life Diet of Usain Bolt.”
Elle: “Here’s What Olympic Weightlifter Morghan King Really Eats in a Day.”
Meagan Nielsen, registered dietitian; team dietitian, USA Weightlifting.
Tim Swords, coach of Sarah Robles; owner, Team Houston weightlifting.