[Aximilation]

That's actually a really good point, I just posted on my blog (blog.aximilation.com) an article about how I got sick and polyphasic sleep was not enough for my body to get the rest it needed at the time. (article: http://blog.aximilation.com/blog.php?title=the-sickness&...) Excerpt: "...if you begin working out, do some hard labor, experience a lot of stress or get sick, your body may need more downtime, physically, in which case a polyphasic schedule may not be sufficient..."

You may or may not be functioning at your best, puredoxyk, one of the pioneers of polyphasic sleep is very active in kung fu and various physical activities and has no trouble. I would not say that it's hardly functioning at your best, it depends on what your body needs, what it is used to, and also your lifestyle.