treadmill (heavy incline walk/run) 36:00 
ahr:145 shoes: Barefeet
Walked with 20# weight vest and 7# dumbbells at a 10% incline. Really pumped hard. My arms and shoulders got tired, but we're essentially numb. I could do whatever I wanted and not feel any more pain than I was in. Of course, finished with Metallica's Some Kind of Monster, so the last 9 minutes were intense.