Fast mile

Today was supposed to be a three mile day. The weather out is cold (not unbearable) but I decided to treadmill. I didn't want to do three miles, so I thought I'd do some speed work. A fast mile. I thought I'd bump up the speed each lap and see how fast I could go. I think I could have been faster if I had started a little faster. Here are my mph settings: 6.0, 6.2, 6.6, 7.0. That gave me a 9:20 mile. Next time I'll try going a little faster and see what happens.