HIIT IT! at Athleta Flatiron! October 27, 2014 by Daphnie Yang Way to HIIT IT! at Athleta! Delish. #protein Athleta in the Flatiron hosted a huge HIIT IT! event this past Sunday! Sponsored by Powerful Yogurt, Barnana, and Nutiva! Such a great event! Way to HIIT IT! Thanks Powerful Yogurt!