I'm not a personal trainer or anything, but I feel like dragging tires down the road via twine that you have looped around your ankles is not a super good idea, man.

Tim Grover, a guy who has trained Michael Jordan, Kobe Bryant, and Dwyane Wade is a professional trainer, though, and he also thinks this is a bad idea:

I guess it made for a pretty decent Instagram photo, though.

[DC Sports Bog]