Bill Gates said:OK so the protocol is 20 seconds on 10 seconds rest for 8 minutes. I still say that to go at max (if really at "max") effort for 20 seconds would need more than 10 seconds rest for repeat efforts. Some are taliking about doing this for 20 minutes or even an hour. Ridiculous! Can't be done.
This training is for your VO2max and IMO is best left until you've got some endurance miles under your belt.
max effort at which you can produce at the time.
I.e. not 1000Watts, then 1000 Watts the next effort. The amount of power would diminish, even though you are putting in your max effort.