love this article... absolutely love it...
My coach wants me hitting 45 mins of cardio a day, so i usually warm up with 20 mins of liss, go flip a tire for 15 mins, then come back for a cool down... it really breaks up the time well...
Tire Flipping
Battle Ropes (love the full body, bring them ropes up and then slam them into the ground with bad intentions)
Jump Ropes
lots of fun ways to do HIIT...