Flat-Belly Challenge Day Begin with the fat-blasting workout. We've created three versions of this treadmill run, along with a printable version of all three levels! Best way to loose belly fat is through interval training!
This New Interval Training Trend Makes Working Out Faster—and a Lot More Fun The Interval Workout That You'll Actually Love Getting tired of just running endlessly on the treadmill? Try out this workout and you'll never be bored again!