Treadmill vs. asphalt

I was supposed to complete 2 miles each on Sunday, Tuesday and Thursday. I did not run on Sunday- I was still getting over the shin pain from Saturday, and the headache too. On Tuesday & Thursday I ran on the treadmill in the gym at work. I input a pace of 3.5 (miles/hour), and still had to slow down to a walk a couple of times. My breathing was all over the place, but I felt good at the end of my runs.

The 2nd Saturday run was 3 miles, and I ran with a couple others who were at my pace level- 15 min milers. Coach had said that we should be able to talk and run at the same time. I was able to emit a few breathless words during the entire walk/run...running on asphalt was definitely harder than running on the treadmill. I decided to try & do my weekday runs in the park too...