I’m sure there are business parallels in the idea that ultramarathons (runs of as much as 50-100 miles) are easier on you than mere marathons, but it’s just plain interesting in itself:
I’ve heard people say ultras are easier on your body than marathons. How could that be?
From the intensity standpoint, it’s easier. You’re going at a moderate rate over a longer period of time. You’re stopping at aid stations, you’re getting something to eat, refilling your water bottle. In marathons, you go, say, three and a half hours at the exact same pace over pavement. Most ultra courses have a variety of terrain, so you’re using different muscles. Even the outlook is different: I’m going to walk for 30 minutes, then I’m going to run downhill for 40 minutes. That’s completely different from I’ve got an hour and 15 minutes of First Avenue ahead of me.
[via Runners World]