This is an addendum to my post.

I failed to mention that I think that, although a person with a circadian period of less than 24 hours might have more trouble recovering from travel in either direction, depending upon how far in each direction we are talking about (such people are weird in other was as well), the short-period person, should, in principle, have more trouble recovering from westward travel than from eastward. This is the opposite of your guess, as published on page 30.

Again, somebody explain why I am wrong, if I am.

Thanks,

Don Roberts