Cindy-
Here is the HIIT program that is programed into my treadmill:
Warm up: 3:00 minutes
interval training: starts immediately after the warm up with a 30 second sprint interval: changing both speed and elevation. Seven recovery intervals of one minute and 30 seconds will alternate with the eight 30 second sprint intervals. The sprints will increase in speed and elevation at the 3rd and 5th interval. The recovery speed is about 2-3 mph slower than your sprint and the recovery elevation is 0.
Cool down: 2:30 min.
so for me:
warm up: 3 min. at 3.0 elevation 0
sprint 1: 30 seconds: at level 7.5, elevation level 6
recovery interval: 1:30 min.: at level 5, elevation level 6
sprint 2: 30 seconds: at level 7.5, elevation level 6
recovery interval: 1:30 min.: at level 5, elevation level 6
sprint 3: 30 seconds: at level 7.7, elevation level 6
recovery interval: 1:30 min.: at level 5, elevation level 6
sprint 4: 30 seconds: at level 7.7, elevation level 6
recovery interval: 1:30 min.: at level 5, elevation level 6
sprint 5: 30 seconds: at level 8.0, elevation level 6
recovery interval: 1:30 min.: at level 5, elevation level 6
sprint 6: 30 seconds: at level 8.0, elevation level 6
recovery interval: 1:30 min.: at level 5, elevation level 6
sprint 7: 30 seconds: at level 8.0, elevation level 6
recovery interval: 1:30 min.: at level 5, elevation level 6
sprint 8: 30 seconds: at level 8.0, elevation level 6
recovery interval: 1:30 min.: at level 5, elevation level 6
cool down: 2:30 minutes: level 5
Its a great program and very challenging! It took me a while to get to this level, so I wouldn't start here, I just wanted to give you a more detailed idea
HTH
Deanie