I've always like aerobic exercise especially running sprints because it's so primal and we've been doing it since the dawn of mankind. I'm in the process of doing sprints (interval training) 3x a week to burn off the excess fat I have on my body. Plus, I get to train and become fitter just in case we get taken over by zombies and at least I can run faster and perhaps have a higher chance of surviving than most of the potato couches out there who don't run and eat donuts all day.