Functional Age and Bouts of Physical Activity in Middle-Aged to Older Japanese Adults; Yurin-Study

Abstract

Purpose: To examine the relationship between the functional age (FA) and the objectively measured daily physical activity (PA). Methods: The subjects of the present investigation were 15 males and 22 females (68±6 yr.). The Anti-Aging-Dock determined the 5 components of FA (Bone age; BA, Hormone-age; HA, Muscle-age; MA, Nervous system-age; NA, Vascular-age; VA). Each participant wore an electronic pedometer (HJ-720IT, Omron Corporation, Kyoto-city, Kyoto Japan) in order to determine daily number of steps (STEPday) and the time and steps for PA lasting longer >10-min at >60 steps·min –1 of the step rate (Bouttime and Boutstep). The HA was evaluated by using the standard aging curve of serum DHEA-s and IGF-I concentration. Result: Simple correlation coefficient showed that the HA significantly associated with STEP day and Boutstep in female subjects (p 10-min may be an effective PA to protect the age-associated changes in hormonal functions.