Is there a need for psychophysical strength studies of the aged?

Abstract

Strength studies are needed that simulate everyday activities of the aged in the home and workplace. There have been many studies examining the decline of strengths that occurs during the aging process; however, most have investigated isometric (static) and isokinetic (dynamic) contractions. While these studies are beneficial in identifying age-related differences, isometric and isokinetic contractions can not be adequately duplicated in the human body and usually apply to laboratory studies that isolate the whole muscle or single muscle fiber. Generally speaking, most people will not attempt to lift weights or apply forces that are perceived as heavier than manageable. The maximum load that can be handled without overexertion is referred to as psychophysical strength. Psychophysical strength studies can provide data identifying the maximal acceptable weight lifted, carried, or forces exerted, in a variety of simulated activities in the home and workplace. Psychophysical studies can also give indication to the physiological and psychological components needed for the aged to perform common everyday activities. This paper outlines the potential importance of psychophysical studies on the aged.