Yeah, I've wondered the same. I recall another study -- no idea where I'd find it now -- which did body scans of runners. They found that runners which average

Yeah, I've wondered the same. I recall another study -- no idea where I'd find it now -- which did body scans of runners. They found that runners which averaged 11mi/wk had substantial interior fat deposits. Runners that averaged 17mi/wk had very little. Actually, did a bit of Googling, looks like it might have been a study by Dr. Uwe Schütz published in 2009, found a mention of it here: http://www.runnersworld.co.uk/weight-loss/running-the-life-saving-workout/8408-2.html http://www.runnersworld.co.uk/weight-loss/running-the-life-s...