@CNN: Want to be gym trendy in 2018? Do HIIT https://t.co/vQQb6in6ZI (via @CNNHealth) https://t.co/BDav15gboZ
Want to be gym trendy in 2018? Do HIIT https://t.co/vQQb6in6ZI (via @CNNHealth) http://pic.twitter.com/BDav15gboZ
— CNN (@CNN) January 3, 2018