This article is from the Publications about dogs FAQ, by Cindy Tittle Moore with numerous contributions by others.
Zink, M. Christine, DVM, PHD. _Peak Performance: Coaching the Canine
Athlete_. Howell Book House, 1992. New edition available from
the author at 1907 Eastridge Rd., Timonium, MD 21093.
This eminently readable book goes over canine physiology, both
internal and structural. She covers how to keep your dog in
general good shape, discusses some conditioning strategies, and
finally details a number of possible impediments to
conditioning your dog, including: genetic and traumatic joint
problems and lameness, the effects of medication on your dog,
and moreover lists all the things you need to consider when
trying to keep your dog fit and healthy. Recommended for all
people doing regular physical activity with their dog.