Last Monday I had an awesome run. It was 43 degrees outside and I ran exactly 5 miles in 1 hour (12:00 min/mile pace). I was surprised because I was pretty tired and not sure if I had done too much the week before. As I was going, I felt like I was actually running again for the first time in forever, not just bouncing up and down basically in place. I did hit 171 a few times and slowed down to walk each time it happened, and decided I would run again when I got below 140. Each walk break was around 1:30, so not too long. My previous fastest pace staying under 171 was over 12:50, so this was quite a breakthrough run. ...then Wednesday happened. In just 36 short hours, temps were up 30 degrees, and it seemed my HR was up 30 bpm as well! I was planning to do an hour run through River Oaks from my apartment before my dad came to pick me up to go to San Antonio. It was raining when I started, but not too bad. After about 3 minutes I decided my hour run was going to be about a 30 minute ru...