Well that just figures.
I was in Phoenix AZ for a week on business, and decided that it just wasn't worth the hassle to either a) ship a bike down, b) fly with a bike, or c) rent a bike while I was there. That meant a week of toil on the exercise room elliptical machine just so I wouldn't feel like a fat tub of goo after eating restaurant food all week.
Meanwhile, one of my co-workers was training for a marathon. His entire training kit fit in a tiny corner of one small carry-on bag. So while I marinated in my own sweat, he put in real miles on 70-degree mornings with zero humidity.