Endurance†: 40-30-20-10 rep rounds of: Calories biked Speed skips Calories rowed Crossover single-unders Calories skied Double-unders   For time* *For Rx, all jump rope must be done unbroken Compare to Friday, 06 June 2025   †Levels: Intermediate/70+ Advanced: Same reps as advanced, jump-rope does not have to be unbroken Beginner/70+ Scaled: 32-24-16-8 reps, single-unders...Read More