jools7 wrote: hi again Bruce, just saw your post on frequency - yes, I think the jury's out! if you're pushing the duration up, I would be cutting down the frequency, 5 times a week sounds a bit much. Maybe four? Steve Boutcher says it's fine to do 4 a week, it's hard to strike a balance between being gung-ho and preaching to the lowest common denominator, I find.
Thanks jools7, original Tabata protocol had 4 days/week with the intervals plus a day of 70% medium-intensity for 45 minutes. I'm thinking 3 days is definitely safe, and that it might be that, depending on the regimen you use, a good rule of thumb would be to never do it two days in a row (like intermittent fasting LOL) and to put at least a day between two HIIT workouts. (Maybe the ADF people could do HIIT on fast days or feast days...)
I'm also seeing a lot of 4-day and 5-day recommendations. With a 4 minute workout that makes more sense. I think you're right in that if I want to go beyond the basic 4-minutes it wouldn't hurt to put at least a day between each workout.
Good stuff. I think I'll stick with my plan, then, of going 3 days per week and building up to 8 minutes over time.
Keep posting and let us all know how your HIIT workouts go from time to time!