Fitness Requirements for Rugby
From Martin's Rugby Coaching Archive.

Fitness Suggestions for Rugby
From The University of Texas Medical Branch Rugby Club's site.

Fitness Testing
An article from Martin's Rugby Coaching Archive. Describes various fitness tests and their advantages and disadvantages.

Maximum Oxygen Consumption Primer
From the Nicholas Institute of Sports Medicine and Athletic Trauma Site.

Muscle Physiology Primer
From the Nicholas Institute of Sports Medicine and Athletic Trauma Site. Technical material.

Plyometrics
A definition and general introduction to plyometrics from the Sports Coach site.

Rugby Fitness Training
An interesting site focusing on the need for Rugby Union players to be fitter and train harder than in the past.

Speed Training
From the Sports Coach site.

Weight Training Schedule
A free download in Microsoft Excel format from Martin's Rugby Coaching Archive.

Personal Trainer, from TopCondition.com
Comprehensive exposition of sports injuries with information about prevention and rehabilitation. Also includes anatomical information and how to prepare the body for the stress of sports.