How To Customize Your HIIT Mar 04, 2019 Posted by: Jennifer Davis best hiit exercises, bodyweight workout, cardio at home, high-intensity interval training, HIIT Cardio, hiit treadmill workout, hiit workout at home, hiit workouts, hiit workouts at home, hit High-intensity interval training (HIIT) is a well-documented strategy for improving health, building lean muscle, burning fat and increasing endurance.