Rotherham United: Measuring performing and impact training

It was thoroughly enjoyable going behind the scenes at Rotherham United! Check out the video:  https://www.youtube.com/watch?v=96jmHtfTm9Q 

I particularly enjoyed hearing how Adam takes the data straight onto the training pitch to provide training insights to the coaches.

What is your favourite insight from the video? Any guesses on who is the fastest player at the club?