This treadmill workout has speed intervals for a greater calorie burn in 20 minutes than you would from an easy/moderate pace for an hour!
30-Minute Treadmill Interval Workout I'm not going to lie... Cardio is my nemesis. After a day of working retail, pounding out a few miles on a treadmill is the last thing I even want to think about. But, it's imporatant. (someone shoot me now!) : P
45-min treadmill interval workout - I always want to scream, "Jane, stop this crazy thing" on the treadmill. Can't imagine getting it up to 10 mph.