WATCH: My Morning Routine: This fitness trainer and mom shares her #MorningGoals

  • Now Playing: Inside the #GainingWeightIsCool fitness trend


  • Now Playing: Instagram fitness star shares her workout secrets live on ‘GMA’


  • Now Playing: My Morning Routine: This fitness trainer and mom shares her #MorningGoals


  • Now Playing: Mom’s viral workout video inspires millions as she vows to lose 451 pounds


  • Now Playing: Michael Strahan gets hooked up to a machine that simulates labor pain


  • Now Playing: ‘Dry January’ challenge mocktails


  • Now Playing: How ‘Dry January’ can change your life


  • Now Playing: CDC reports 20 states experiencing high flu activity


  • Now Playing: CDC reports sharp increases in number of influenza cases


  • Now Playing: Tainted drugs: When medicine makes patients sicker


  • Now Playing: New, single-dose flu medicine now available in US pharmacies


  • Now Playing: ‘Thriver Thursday’: 12-year-old boy overcomes barriers


  • Now Playing: How 2 women each lost half their body weight


  • 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