Ennay-- what i really meant to get across, was that if it can be done on a piece of gym equipment.......the real point is that most people sprint for a minute on a tread and call it HIIT, when in reality it was just an interval....maybe a hard interval at that, but still........ You are a fit woman too!! Can you think of a treadmill workout that would truly, honestly leave you unable to take another step after 12 minutes? As you said, the closest you ever came was outdoors.........
im sure i will catch a lot of flak from everyone around here, but people throw the term around so loosely now....... Most people ARENT really doing them, which is good, because most people really SHOULDNT be doing them!
Once again, let me re-iterate that im sure it IS humanly possible to do a HIIT workout on a treadmill, but i was just saying that more to get a point across.
here is an exerpt from an article, and a link to the article too!
"
When the first interval kicks in you need to go at an ALL OUT SPRINT for 10-20 secs. Unless you are a highly trained athlete you will not (if doing it correctly) be able to do more than this, period. This isn't running, this is sprinting or better put running for your life as hard as you possibly can. I have seen people fall flat on there face before. You are working at a 85 to 90% . You cannot physically move and go much higher than this. I see a lot of people trying to time themselves or their heart rate during these sprints, it isn't possible. You can't do anything else other than pray and run for that 10-20 secs."
http://www.squidoo.com/GuidetoHIIT