Burn Fat With 5 Best HIIT Challenges!

1. The Best Fat-Burning Lower Body HIIT Workout

This workout utilizes the quadriceps and the hamstrings (two of our biggest leg muscles) which allows us to build and burn at the same time! Talk about efficiency! Along with sculpting your legs and booty, it will also improve your cardiovascular health! If you’re short on time, this one is for you!