Interval training torches calories, increases your speed, and targets belly fat and with this trifecta of benefits, what's not to love? But intervals are tough, both mentally and physically. I wish I could say that I love this workout, but that would be a lie. Just ask my running buddy to tell you how I curse when doing this interval sprint. I can, however, easily admit that I love how I feel afterward, and I love that I burn over 450 calories while doing it.
This workout involves sprinting, so run as fast as you can. Since this run can be a little confusing, before you start, mentally divide the track into four equal quarters since you will be running 100-yard sprints at different points around the track. This is not a beginner workout and you should have a strong running/aerobic fitness level before doing this workout. Even if you don't like to race, this is a great way to add spark to your running routine and help you move past a weight-loss plateau.