Watch 15-Minute HIIT 1.0 Workout

No Equipment Needed. Tip:Do Series 1.0 for 4+ weeks before moving onto Series 2.0. This workout is designed to burn mega-calories and improve fitness and muscle tone through high intensity interval training. Great for all fitness levels. Weekly Workout Schedule: Mon: 15-min Full Body Burn. Tues: 15-min Upper Body Sculpt. Wed: 15-min HIIT. Thurs: 15-min Lower Body Chisel. Fri: 15-min Core Challenge