Buy in: 4 sets of 25 double-unders. If you aren't great at double-unders, this is your opportunity to practice! Mobilize and prepare for the workout.
50-40-30-20-10 reps for time of:
If you're truly an ace, make challenge yourself to complete every set of double-unders unbroken. Have a hiccup on rep 39 of the 40 set and miss? Start over! Dare ya!!! It's fine to anchor feet for sit-ups. Pro tip: lube your tailbone!