Thinking as to running I had originally enjoyed doing a given interval distance for a couple of workouts in a row then switching to something else. I improved when I did that. Lately I've been running a bit closer to what i read online and haven't had any noticeable improvement. So then plan on doing quarter repeats for three workouts and then 3/1 for 3 miles for three workouts, then start over. Did quarter repeats today for the first time in quite a while. Feel good for having done so.

The tunnel is nice and cool, a good 20 degrees cooler at least, probably more. And in the winter it will be a place not covered in snow. How lucky I am that it's there.