Just an addendum as I've been catching up on reading, and notice
that the two came up separately. For me they're related.
For breathing, definitely go for 'belly breathing'. More accurately,
breathe from the diaphragm and fill your lungs fully. Same method
and reasons as for playing wind instruments, public speaking/acting,
singing, swimming, etc. You'll also be doing this if you're asthmatic
and want to not stop breathing entirely.
The relevance to stitches is that it's better, I confirmed some
folklore of the newsgroup, to have an odd total cycle. So many
steps inhaling, so many exhaling, and add to an odd total. If I'm
running hard and breathing deeply, an even total is a near guarantee
for stitches in short order. Now if you're not having stitch problems,
don't worry. You're either already odd, or just don't have the stitch
problem.
--
Robert Grumbine http://www.radix.net/~bobg/ Science faqs and amateur activities notes and links.
Sagredo (Galileo Galilei) "You present these recondite matters with too much
evidence and ease; this great facility makes them less appreciated than they
would be had they been presented in a more abstruse manner." Two New Sciences