Double-Unders, Rowing and Step-ups Workout

For time:
* 100 double-unders
* 50 calorie row
* 25 step-ups, 24/20 inch, 20/15 kg

Scaled version:
* 100 single unders
* 50 calorie row
* 25 step-ups, 20/12 inch, 15/10 kg