What a Difference a Day Makes

Today, I woke up earlier and got out to run. It was much more enjoyable, less heat, less humidity, more breeze. I had much more energy. I am still sticking with keeping myself around my target heart rate, which is frustrating, because I feel as though I can go faster.

Temp: 70
Weather: Sunny, Slight Breeze

Time/Pace: 41:14/10:18
Avg Heart Rate: 145

What was is most unusual about this time is it is the exact same time as I recorded on Tuesday for the same distance (4 miles), but the average heart rate was 4 beats slower.