Originally Posted by
Jonathon Sullivan
Well, the video takes note of a number of conditioning modalities in particular and implies an almost limitless range of conditioning options in general. "Lift weights and do bike sprints" or "lift weights and hit the heavy bag" or "lift weights and go to ballet practice" don't require a sled.
As to "working the heart," I'm not aware of any form of vigorous exercise that doesn't. That's my entire point in the quoted comment. "Cardio" isn't a fallacy. It's just a term that is so general and nonspecific in ordinary use as to be meaningless.