Senior Fitness: American Senior Fitness Association, the leader in older adult fitness education and certification, senior exercise, aging and exercise Senior exercise information, senior fitness education and advanced senior fitness qualification from the American Senior Fitness Association. Your source for exercise, aging and wellness resources for exercise instructors older adults and the program developers who serve them. SFA is also a primary internet resource for elderly exercise participants. SFA programs include senior personal trainer, senior fitness instructor and long term care fitness leader. Distance certification is available. The SFA also publishes Mature Fitness magazine, a number of articles of which have been selected for this website. Subscription to Mature Fitness magazine is available with or without membership in SFA.