Get set to build your strength without lifting. And boost your mood without trying. Erin Maw, the fitness mastermind behind LES MILLS GRIT™ and LES MILLS STRENGTH DEVELOPMENT™, has cooked up a new workout combining the best bits of the hottest training trends. Here she explains why LES MILLS SHAPES™ is the smart way to push your body – and what to expect when you give it a go.