My wakeup HR was 48. I felt pretty good during my run, so I added a mile (25%), making the run 5 miles. I've felt all week that I might be on a new plateau of body condition. Last Saturday I was on my feet all day and was quite tired when evening came, but I ran my 4 miles and felt pretty good during the run. On Monday and Wednesday I again had good runs. All of this with less sleep than I'd like. I've been getting 6-6 1/4 hours instead of 7-71/2 hours. I've been struggling for the past year to raise my mileage from 1 mile 3 times per week to 4 miles three times per week. I've been waiting for my body to "kick in" and adapt to higher mileage, and that may have happened this week. We'll see.