Run with a friend.If you and a friend belong to the same gym, get her to run on the treadmill next to you. You can motivate each other and provide distraction to make your workout time go by faster. And one great thing about treadmill running with friends is that you don't have to be the same pace, so you can run with friends who you wouldn't normally run with outside.
Try an interval workout.Rather than running at a constant pace, mix up your run with hard and easy segments. It can be as simple as: A five-minute warm-up followed by three sets of four-minute intervals (two minutes of hard running and two minutes of easy running), followed by a five-minute cool-down.
Mix it up with strength-training exercises.After a 5-minute warm-up, run at a comfortable pace for five minutes, then step off the treadmill and do two minutes of strength-training exercises, such as crunches, push-ups, side-crunches, lunges and dips. Try doing four sets of running/strength-training.
Work on improving your stride turnover.
Treadmill runs are a great opportunity to work on improving your stride turnover because you've got your running time right in front of you. All you have to do is count how many times one foot hits the belt in a minute, then double that number to get your stride count. Elite runners run at about 180 steps per minute -- see how close you can get to that. Working on your stride count can improve your running efficiency, even for outdoor runs.
Zone out.Unlike running outside, treadmill running doesn't require that you pay close attention to your surroundings and watch out for cars, cyclists, dogs, and other hazards. You don't even have to think about your route. So running on a treadmill gives you a chance to lose yourself in the rhythm of your breathing feet or your pounding feet. Try blocking out everything around you and enter a peaceful, relaxing state.
Do a pyramid workout.The time flies by during this treadmill workout because you're paying so much attention to your interval times. After a 5-minute warm-up, run hard (5K pace) for one minute, recover one minute; run hard two minutes, recover two minutes; run hard three minutes, recover two minutes; run hard four minutes, recover two minutes; run hard five minutes, recover two minutes. Then work your way back down the "pyramid" and run hard four minutes, recover two minutes; run hard three minutes, recover two minutes; run hard two minutes, recover two minutes; run hard one minute, recover one minute. End the workout with a 5-minute cooldown.
More: Pyramid Speed Workout