Indoor day. I wanted a good workout, but couldn't decide between hills and tempo, so I did both. Did 2 miles warm up at 7:30 pace, then did 4 tinman tempo miles (6:30 pace). Next, I slowed down to 7:30 pace again but started increasing the incline on the treadmill 0.5 degrees every minute. After 15 minutes I was up to 7.5 deg and working hard. I then quickly bumped it up to 10, then 15 just for fun. Could barely do it. Lowered back to 10 degree incline and slowed the pace to 10 min miles. Did this for a bit. Then lowered down to 5 percent and sped up to 7:30 pace. Then did a bit more at 2 percent. Once I got back down to 0 incline, I had 1 mile left. I did the first half at 6:00 pace and the second half at 5:00 pace (I felt like jtshad). Might have done a bit more but I wanted dinner (it was after 8 pm) and the treadmill got very wobbly above 10 mph. Felt good overall- and I got in a good workout, too.