HIIT stands for High Intensity Interval Training--aka these are intense workouts that are meant to burn a lot of calories quickly. These are the 5 Best Fat-Burning HIIT Challenges. HIIT stands for High Intensity Interval Training--aka these are intense workouts that are meant to burn a lot of calories quickly. These are the 5 Best Fat-Burning HIIT Challenges.
Get ready to jump the calories away with this plyometric circuit that combines bodyweight exercises with power moves. Get ready to jump the calories away with this plyometric circuit that combines bodyweight exercises with power moves.