I'm following a training plan that uses intervals. I hate 'em.

I use a stopwatch, and I know when I'm supposed to start, and it's just not an option to stop until time is up. They're short -- 30 seconds, followed by 4.5 minutes of recovery. I do three sets, then recovery for 10 minute. Three sets of those. ouch. Then there are the three minute high cadence ones, or the 10-second max cadence. And, the always wonderful one-legged drills. 60 seconds left, 60 right, 60 both, repeat 8 times.

Quiting is not an option.