WATCH: ‘GMA’ January Challenge: Amy Robach on her love of running and how to get started

  • Now Playing: Dr. Jennifer Ashton gives an update on her ‘Dry Jen-uary’ challenge


  • Now Playing: Foodies across the globe are taking part in the ‘fire noodle challenge’


  • Now Playing: ‘GMA’ January Challenge: Amy Robach on her love of running and how to get started


  • Now Playing: Rocco DiSpirito’s tips for healthy cooking in 2019


  • Now Playing: How 4 relatives lost more than a combined 400 pounds


  • Now Playing: Best diets for 2019 revealed


  • Now Playing: My Morning Routine: How CrossFit athlete Brooke Ence begins her day


  • Now Playing: How meditation can help you in 2019


  • Now Playing: How meditation can help you in the new year


  • Now Playing: Conservative commentator Bre Payton dies shortly after flu diagnoses


  • Now Playing: Everything you need to start keto in 2019


  • Now Playing: Everything you need to start Whole30 in 2019


  • Now Playing: Celebrity trainer shares how faith informs his approach to fitness and health


  • Now Playing: ‘Bloated Belly Whisperer’ author shares pro tips to fight back bloating


  • Now Playing: How to fight back against holiday weight gain with a 10-minute workout routine


  • Now Playing: Hack Your Happiness: How doing favors for others can make you happier


  • Now Playing: New Jersey surgery center possibly exposed thousands of patients to HIV, hepatitis


  • Now Playing: Hack Your Happiness: How learning gratitude is changing an Illinois middle school


  • Now Playing: Teen dances ‘Nutcracker’ lead after 15-hour surgery


  • Now Playing: Is loophole keeping unfit doctors practicing medicine?