How fit do I need to be to do LES MILLS GRIT? This workout is designed to challenge YOUR fitness. Exercise modifications allow everyone to push their individual limits. By admin|2016-12-17T21:38:59+00:00December 16th, 2016|0 Comments Share This Story, Choose Your Platform! FacebookTwitterLinkedInGoogle+PinterestEmail About the Author: admin Leave A Comment Cancel reply Comment Save my name, email, and website in this browser for the next time I comment.