So my brother knew me better than I knew myself. I’m psyched to have data at the end of my run. Tonight in a 53-minute workout I spent 47 minutes in my target heart rate zone, with an average of 165, and burned 504 calories! That’s quite a bit more across the board than I thought. Time and calories fly when you’re chatting with people. Of course, I have no idea how far I went—somewhere between 4 and 5 miles—but that’s actually less interesting to me.