" A couple were sprains or knee injuries, and virtually none of the collar bone breaks I expected when people try to stop themselves with their arms." Thanks,

" A couple were sprains or knee injuries, and virtually none of the collar bone breaks I expected when people try to stop themselves with their arms." Thanks, Mr. Self-Taught medical expert, who thought running 17 miles without prior prep was a good idea. "It is also understood that trying to run before you're ready can result in injury" This is also true of HIIT. "don't involve spending lots of money on running gear" ?????