On the right track

I had a good workout yesterday -- 33 minutes on the treadmill. The last few workouts, I have been throwing in 5-minute surges. I've been doing my abs and pushups on the ball, also. I feel very strong. I can't wait to get outside to run. I'm gonna go 30 minutes outside tomorrow, trying to keep things steady and smooth. I have visions of 90-second 400s going through my mind -- 10 of them. I think I am in good shape to do that. I am staying injury-free, too. Achilles are strong. But I'm not going to overdo it.