Sport stacking (also called cup stacking and speed stacking) may look pretty straight forward — upstacking and downstacking x-number of cups in a certain order as fast as possible — but it’s the millisecond improvements that the sport stacking pros are chasing.

In this Vox video, The incredible sport of cup stacking, explained, Phil Edwards learns the basics of stacking with Melissa Gomez, Zhewei Wu, and Mark Sykes to find out what drives a stacker to stack, and how they try to improve their times.

Next, learn how to stack: An Individual Cycle Sport Stacking World Record of 5.000 seconds.

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