General Fitness

American Council on Exercise—A searchable database lists more than 40,000 ACE-certified personal trainers. Also features articles on health and fitness.

Phys.com—The website for Self magazine; offers current fitness and nutrition information.

Health and Nutrition

Food and Drug Administration—Consumer information and warnings about food, drugs, medical products and dietary supplements.

Running

International Association of Athletic Federations—The international governing body for track and field, road running, cross country and race walking.

Road Runners Club of America—RRCA is the largest grassroots running organization in the US.

Swimming

US Masters Swimming—Lists masters swim programs in the US and offers information on training, technique and competition.

Yoga

American Yoga Association—Homepage of this group directs you to general information about yoga.

YogaFinder—Includes lists of yoga classes and instructors by area, plus offers many links to informational yoga pages.