Indoor stepmill/stairmaster HIIT workout

2 minute warmup at level 5
1 minute level 10
30 seconds level 7
1 minute level 11
30 seconds level 8
1 minute level 13
30 seconds level 9
1 minute level 14
30 seconds level 10
30 seconds level 15
1 minute level 10
30 seconds level 14
1 minute level 9
30 seconds level 13
1 minute level 8
30 seconds level 12
1 minute level 7
30 seconds level 11
3 minute cooldown level 5