Best way to recover fitness after fasting?

Recently I've been experimenting with HIIT (High Intensity Interval Training)

I have found it a problem re-gaining my fitness after fasting, and I've only been doing HIIT for a week but already I feel a very marked improvement in my physical and mental health.

I've been doing it 2 ways:

1.Cycle for 15 mins to warm up, turn around to come home and on the way home do 3-4 20 second bursts at 100% effort, separated by a few minutes to recover my breath. I use my watches timer to measure the 20 seconds each time.

2.At work - walk to the top floor (9 stories) as quick as possible. Done after my 1 hour lunch break where I walk round town for an hour to warm up.

I used to cycle at a moderate pace for 1-1.5 hours, but I don't think that was enough to recover from the extremes of dry fasting.
HIIT is much quicker and seems to give much better results.


I recommend watching this Horizon documentary if you have time:
http://www.bbc.co.uk/iplayer/episode/b01cywtq/Horizon_20112012_The_Truth_Abou...



http://en.wikipedia.org/wiki/High-intensity_interval_training