The way I see it, handlebars ought to offer numerous hand positions, so
that the hands, wrists, arms, shoulders, back and neck, can all be
adjusted for maximum comfort and suitability depending on the elements
and road surface. For this reason, flat bars just don't cut it. They
are fine if you only ride a short distance/time, but otherwise they suck.
These trekking bars are a good alternative, and another is the moustache
bars as depicted here:
http://www.bicycle-touring-guide.com/bicycle-handlebars/ Scroll down a bit.
Sheldon's site also has a useful page on the subject.
http://www.sheldonbrown.com/deakins/handlebars.html
These look pretty neat.
http://www.koga-signature.com/en/News/Atalanta
Of course many people are happy to use regular drop bars too, and
there's nothing wrong with that if they're comfortable using them. I
certainly didn't complain of soreness or stiffness in the upper body
after completing a 190km ride about a month ago. In fact apart from the
general energy depletion, I felt pretty good afterwards.
Another example of choice and pros and cons.
--
JS