Originally Posted by
robertv
Honestly, I think a lot the guy's I work with ride less. Im doing around 80, sometimes more, sometimes less, and I'm doing the big suburb to suburb runs because I'm new. But if you really wan't to see what it's like, get on a bike and ride for ten minutes. Then sit still for ten, then ride for ten minutes, and keep doing that for about nine hours. Your legs will probably be pretty shot. Before I was doing the messenger work I was doing 40-60k every morning and then an 80 k once a week or so. That 80k never wore me out nearly as much as my job does. You're inside just long enough to cool down and for your legs to get heavy every time you deliver or pick up. So I would say that it's quite physically demanding. Most of the time I'm not even riding that fast and I'm still exhausted at the end of the day.
I dunno... 80 Km divided in 10 minute stints interspersed by 10 minute walks doesn't seem something that would require humongous amounts of conditioning. Hard, yes, likely, but not herculean.