Notwithstanding all the good posts about babies nursing voraciously after
their moms exercise, I think the original poster was probably asking in
connection with a study, reported a year or so ago, that mom's milk was less
good for babies right after exercise -- not less tasty from lactic acid but
less nutritious.

There was a long thread about this on Lactnet last year some time (have you
checked the archives?).  The research had suggested moms wait a half hour or
so because whatever micronutrient or whatever it was that dropped with
exercise went back up in that time.

However, this was only about milk (pumped milk, of course) immediately
post-exercise being slightly *less fabulous* than it usually is.  It wasn't
bad, or dangerous, or etc -- clearly still lots better than The Other Stuff.
They didn't even suggest you pump ahead to feed other milk of you own -- just
that you wait half an hour ("there, there, sweetie, I'll be ready to feed you
in a half an hour...")

Without remembering the details, my impression was that unless you were
exercising before every single feeding this was not going to be affecting
your baby's health much and was just not a big deal.

Elisheva Urbas, NYC
(I only wish I could testify to this from personal excercise experience)

             ***********************************************
The LACTNET mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software together with L-Soft's LSMTP(TM)
mailer for lightning fast mail delivery. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html