Cranky Fitness has awesome powers. When I read about tabatas in Crabby's post here I thought they sounded horrible. My whole approach to exercise is can be summed up as "just keep moving." But I went to the gym today, and while I was on the elliptical, I noticed the man next to me doing intervals, and I thought, what the heck. So I tried one. I counted seconds in my head instead of looking at my watch, which would have required removing one hand from my death-grip on the elliptical, and I almost fell off as it was. I also suspect my version of "all-out effort" isn't as out as all that. But I tried one, and I might do it again. I was near the end of my mile, so I went straight into cool down, since I had actually broken a sweat.
This post is without illustration, since getting the iPod out of my pocket and trying to take a picture of my rapidly moving feet would have resulted in injury or death.