Now that you're running for a mile perhaps you want to do it quicker. Well the treadmill is the perfect machine to help you do that as well. You can learn to run faster by using the incline feature. Instead of walking for 1 minute set the incline to 2% and run. Then bring the incline back to 0%. You alternate between running at an incline and running flat.
Doing this is harder on the body so when you go to run a mile again on 0% incline or a flat treadmill you will be able to do it quicker. Once you're run one mile you're a proper runner so perhaps you can take your new found hobby to the next level. Perhaps you can learn to run further. It's all about taking it slowly and running a further distance each week. Your body will slowly adapt itself by losing weight and becoming fitter.
Soon you may be running 3.1 miles. This is exactly 5k, 5k is the distance that a lot of races in the country run for. We have our own 5k training plan and its perfect to take on after running a mile. When you've come to this point it's important to get some running shoes even though you're running on a treadmill as they are designed for running and are kinder to your joints.