[sp527]

If you're obsessive about sleep, I think you'll be fine :) My mistake was doing 3 20 min sessions of pretty intense HIIT a week and then not getting nearly enough sleep (averaged maybe 6 hrs). I felt chronic fatigue at work - it feels like a heavy wave of exhaustion very different from typical feelings of tiredness. You'll notice your work performance degrade correspondingly. Under normal circumstances you might be able to get away with bad sleep for a handful of days or even a few weeks. Not so with HIIT. You have to have an athlete's level of attention to your recovery.

All that said, HIIT is the most effective kind of exercise I've encountered and I recommend it wholeheartedly!

[justacat]

Thanks for the reply. I've been easing my way in with just 30sec on, 30 sec off for 5 minutes a day. I did two sets on day, and had to get up early the next day and was wiped out.

Good to hear your experience!