About,com - Senior Health - Provides links, articles and information on senior health and fitness. Geri-Fit - A 45-minute evidence-based strength training workout for older adults. Classes offered in some US locations. Encyclopedia of Sports Medicine and Science: Aging and Exercise - A comprehensive and somewhat technical article on the physiological changes associated with human aging and the positive role that exercise can play. American Senior Fitness Association - Provides senior specific fitness training, certification and resources for exercise professionals who serve older adults as well as fitness information and tips for mature exercisers. Senior-Fitness.com - Offers information on stretching and exercises to maintain balance and prevent falls among seniors. Alexander Technique and Aging Well - How this century-old method of stress reduction can help seniors. Silver Sneakers - Fitness programs for seniors working in conjunction with health plans. National Senior Games Association - Promoting healthy lifestyles for seniors through education, fitness and sports. Sit and Be Fit - Award-winning health and wellness chair exercise television program promoting healthy aging, functional fitness and rehabilitative exercise. Led by Mary Ann Wilson, RN.