Tempo

Tempo run, unknown distance, about 35 minutes at 95% RPE, and then it got pretty dark on me. It was pretty cool to be haulin' along, heart rate at 173, and it felt hard, but maintainable. My max HR, depending on the calculation, should be something like 183. I've seen it over 190, so the calculation clearly isn't perfect, but it still felt good to be cruising, and fast, at a very large percentage of my max. This tempo/interval/long run thing seems to be working!