Ati: The biphasic schedule (4.5 hours +1.5 hours) looks like it would work well. Another possibility which I've thought about myself but never given a serious trial is triphasic sleep with 90-minute naps every eight hours. Since each nap should get a full sleep cycle, the adaptation should be much easier than other polyphasic schedules. At the same time, I haven't seen any reports online from anyone who's actually done it.
Whatever you decide to do, be sure to give it a good 30-day trial. I've heard that it takes the body about 21 days to completely adapt to new habits and conditions (in general, not just with sleep schedules), so you won't know what it'll really feel like until the last 9 days of that trial. Also, write out and use a firm intention that will train your subconscious to help you succeed (and have even further positive effects, if you believe in the Law of Attraction). For example, "in a healthy and positive way, I am now successfully adapting to a biphasic sleep schedule."
Last edited by David Hausladen; 11-14-2006 at 05:08 AM.