I did it for a number of years when I was boxing. It build coordination, strengthens ankles, calves and quads. I was fit and I would do 2x sets of 1000. I'm wondering if I should start again!

Its bloody hard. I work from 6pm until 5am. I wake up and feel like I'm drugged. I do get about 7 hours of sleep though which is the best I can do with earplugs in, an eye mask and a 'storm' screensaver on in the background which also blocks out a lot of sound... Anyway about an hour after I get up ...