USING THE LES MILLS SMARTBAR™, WEIGHT PLATES AND THE BENCH, LES MILLS GRIT™ STRENGTH IS AN INTENSE 30-MINUTE TEAM TRAINING SESSION THAT WILL BLAST ALL MAJOR MUSCLE GROUPS AND TAKE YOUR TRAINING TO THE NEXT LEVEL. LES MILLS GRIT™ STRENGTH:1BUILDS STRENGTH AND TONES LEAN MUSCLE.2PUTS YOUR METABOL..