<sarcasm>
cardio is for chumps. i do prowlers, slosh pipe carries (zerchers, yoke walks, etc), farmers, tire flips, and sledge work till the cows come home though.
</sarcasm>
i used be an avid runner and cyclist. but i must say i really like that stuff now. i'll throw in some tabata style KB swings 1-2 times a week too. good stuff.