Iron Hand Tameshiwari 
Karate and Gung Fu methods of conditioning and brick breaking.
http://www.karatebreaking.com/Physical Training Journal
An online journal covering exercise, nutrition, fitness and injury for those engaged in the combative arts.
http://www.ejmas.com/pt/
The Concepts and Philosophies of Training for a Fighting Art
Information on warming up, stretching, punching, kicking and sparring. Includes summary and acknowledgements.
http://www.geocities.com/mcone21/index.html
Combat Effective Martial Arts
Training information and advice for all fighters. Articles, free e-zine, e-books and resources on all things training and conditioning.
http://www.combateffective.com
Fitness, Nutrition and Martial Arts Instruction
Information and training for most martial arts with detailed fitness and nutritional information
http://www.totalfitnesssolutions.com
Combat Fitness
Personal insight into fitness training using both conventional and various martial exercises.
http://www.frixo.com/sites/fitness/
FightingArts.com - Stretching
Several articles on flexibility.
http://www.fightingarts.com/reading/get_articles.php?cat=Stretching
Speed Bag Central
Information on the specifics of speed bag training. Includes basics, tips, rehabilitation, and photos from events.
http://www.speedbagcentral.com/
