Adam especially I would like to know what you think:

I was reading a training routine alot of Tennis players do in the off season for stamina, they do 10 laps of a 400 metre track in 76 seconds with 60 second break in between every lap, so overall they are covering 4000 metres ( around 2.6 miles ) in just over 23 minutes including the break and the 76 second laps, would this be very good for stamina?