I don't know HIIT can someone give me a good HIIT routine on the threadmill?

[Changing]

I don't know HIIT can someone give me a good HIIT routine on the threadmill?

[Matthew D]

quick one
5 minute warm up.. no incline 50% speed
then vary the incline and the speed over the course of the next 15 minutes
go up on both to a comfortable level, either walking fast or running.
the have a rest period ~ the same amount of time.... after you have done this for a while you can shorten your rest period

[hypo]

Treadmill is really not the best. If you must use it, jog for 1.5 minutes, then sprint for 30 seconds. Do this cycle about 10 times for a 20 minute session. Doing this on a real track would be better though. If your endurance is not that great, you can also do brisk walk/sprint and extend the rest period until you can keep up.