Today, I decided to do a short interval workout before hitting the treadmill. I found these two guys, called the Lean Machines, and decided to give their workout a try. It's basically 30 seconds of high knees alternated with another exercise. The first three rounds it is high knees/squat thrusts, second round is high knees/jump squats, and final round is high knees/burpees (no pushup). Since there is no "true down time" in this workout between reps (high knees is not really rest!) it is pretty hard core.
Starting from resting heart rate, my average heart rate for the duration was 145 bpm, which is pretty good for a 10 minute burst workout. Obviously, with these specific exercises, you might need to be in decent shape to get started and you must be able to handle jumping (this isn't real knee friendly).
But, if you need something quick to do, it seemed to go pretty fast! If you are new to this stuff, my advice would be just to NOT stop moving. Even if you get tired. Walk/jog in place if you can't do the exercises full out, but just don't stand still or sit. Great for a good sweat!
Good luck!
Video--> https://www.youtube.com/watch?v=6MPZ6X_14xg
