Polyphasic Sleep: Steve, please answer

[Excelsius]

I read your blog and sent you three questions, but I think I used the wrong return E-mail address. Anyway, could you answer my four questions?

1. What is the effect of rigorous physical activity (e.g., gym, sex...) on polyphasic sleep? Do you get excessively tired?

2.If you don't have a flexible schedule, does biphasic sleep work (1.5 hours long, once every 12 hours)?

3. Is it wrong to use caffeine during the first difficult week of getting used to this new sleep cycle?

4. I have read that polyphasic sleep does not work when one is trying to carry out overtly intellectual activities: studying physics, differential equations, organic chemistry... Did you have ANY such experiences when you were practicing polyphasic sleep and what was your impression? Please be honest here. If you were not studying science, just say so.

Thank you very much. I really hope that you can answer my questions in a timely manner (or if anyone else in here already KNOWS the answers because they have asked Steve or have done it themselves, please tell me).