NewsWorld How to lose weight, according to personal trainers Chris and Heidi Powell, celebrity trainers and creators of the fitness app Transform. - Copyright Allison Tyler Jones Copyright Allison Tyler Jones By Margaret O'Malley with NBC News Published on 27/12/2017 - 16:05 Share this articleCommentsShare this articleFacebookTwitterFlipboardSendRedditMessengerLinkedinVK Chris and Heidi Powell say it's not all about crushing it in the gym. Share this articleComments