50-40-30-20-10 rep rounds of
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Compare to 8/10/10.
If you do not have a jump rope, I strongly encourage you to purchase one. Until you get one, you can substitute tuck jumps for double unders.
If you have a jump rope but are unable to do double unders, you can substitute 4 single unders for each double under.
Here is what it looks like with an elite athlete...