Conditioning
“Flight Simulator”
For Time: Unbroken sets of Double Unders
5-10-15-20-25-30-35-40-45-50-45-40-35-30-25-20-15-10-5 reps

You MUST stop in between sets (the rope must stop).
Once you miss at one level three times in a row, work back down the ladder.

Notes: I did this with singles using the heavy rope (HADES) -- with no misses. Total time was 10:19.