In the last three weeks my shortest daily run was six miles. Even on long/fast runs I don't _usually_ feel pain and I absolutely disagree with your sentiment here.
If you run regularly it is no longer painful by any definition of the word. Quite literally I feel no pain from a run, unless I'm pushing myself harder than usual. Running ten miles at an ~eight minute pace would definitely leave me winded, and could strain my legs. Running six miles at ~eight thirty literally does not hurt.
The worst part, from where I'm standing, is the time consuming and boring nature of the task. I've rationalized it away as necessary, but it doesn't get any less repetitive and the time doesn't go by any faster.
Well if you trained to the point where you don't feel pain anymore then my point is irrelevant and of course you'll be bored.
Also I think your abilities are outside the spectrum of normal. If you ran 6 miles a day for a week that'd be 42 miles per week. If you look at this article http://www.active.com/health/articles/why-too-much-running-i... 20 miles per week is the recommended sweet spot. I think if you can hit 42 miles per week without accumulating any wear and tear on your body then you're one of those people genetically predisposed to for cardio.
If you run regularly it is no longer painful by any definition of the word. Quite literally I feel no pain from a run, unless I'm pushing myself harder than usual. Running ten miles at an ~eight minute pace would definitely leave me winded, and could strain my legs. Running six miles at ~eight thirty literally does not hurt.
The worst part, from where I'm standing, is the time consuming and boring nature of the task. I've rationalized it away as necessary, but it doesn't get any less repetitive and the time doesn't go by any faster.