plenty of people just pass on what they were taught and have observed. With more sports science folk geting involved things are changing slowly.

I was thinking about this the other day, I read on another forum that someone was questioning the use of high rep ab work/medicine balls being hit in your gut (maybe another thread..).

I'm considering that a number of these drills are more to do with mental conditioning than physical.

Yes sprints are hard work and can make you puke but I'd prefer that than going for a distance run. For me it's mentally tougher to get up for that.