I've been using HIIT in a fasted state for almost a week now. I'm very excited about the fat-burning, fitness building possibilities, and I love the way I feel on days that I've done it in the morning. Based on an article I read, I'm working my way up slowly, adding one cycle every 3rd workout. I'm using 30s intervals on a nearby track.

Yesterday, I read a borrowed Men's Fitness magazine that suggested intervals be done based on distance rather than time because you'll naturally be going slower and slower the more cycles you do.

Does anyone have any more experience and/or opinions on the matter?

I don't know. I do my HIIT as follows: 5min warmup 1min fast walk 1min. sprint....I continue for 15 min then follow up with a cool down. I would probably use time as a judge...but i use a treadmill and its easier to watch the time.

i use a tread too...i do 30 sec/ 30 sec walk/sprint...its preset as to what the speeds are so i dont go any slower...but i believe rather than adding more time that the actual intensity is whats important (and i think that was shown on a resent post i dont have the linke but im sure its around here...it was about VO2 max and....speed skaters...and idk ...you might remember) so what i do is just up the speed a little bit every 3/4 workouts

That's the article I had gotten my information from. Based on that, it seemed that times would allow you to have the intensity you needed, regardless of how far you went during the interval.

7- 1min sprints is a pretty impressive thing to do.

When i start my cardio i was going to sprint the straightaways and jog the curves till i can't do it anymore. Is this a good way? Not really time or distance, it's endurance.

P.S i'm on a track.

Don't do this in a fasted state. You will be overtaxing your body and immune system and you will be putting yourself at risk for more catabolism (muscle loss). At least get a banana in your body before you go out and do this.

I have a hard time believing you can reach close to VO2 max in a fasted state.


I've been using HIIT in a fasted state for almost a week now. I'm very excited about the fat-burning, fitness building possibilities, and I love the way I feel on days that I've done it in the morning. Based on an article I read, I'm working my way up slowly, adding one cycle every 3rd workout. I'm using 30s intervals on a nearby track.

Yesterday, I read a borrowed Men's Fitness magazine that suggested intervals be done based on distance rather than time because you'll naturally be going slower and slower the more cycles you do.

Does anyone have any more experience and/or opinions on the matter?