When exactly does old age begin? Health care workers, fitness professionals, and laypersons alike might wish to nail down the answer, but it isn’t as simple as counting birthdays. Whereas many older adults may begin referring to themselves as "seniors" as they reach retirement age, their medical status, physical fitness level, psychological health, and social characteristics vary widely from one individual to the next.
This special issue of Experience! delves into the perplexing matter of defining old age. All of the books listed in the discussion below are published by Human Kinetics. The sources named are experts and their works are recommended by the American Senior Fitness Association (SFA)

