I went to Ultimate Fit today at the Y with Amy (my friend & workout buddy) - and this was our workout! It was a partner workout, so we would take turns doing reps. I would do 10 reps, Amy does 10 etc. until we complete the exercise. I run 200m and then Amy runs 200m. So while your partner is working, you are resting. It was hard but we completed it and feel accomplished!