Aging and stress—introduction of the special issue—

Abstract

The Japanese regardless of sex average life span exceeded 80 years old; man 80.21 years old and woman 86.61 years old in 2013. It is necessary to increase healthy life span (the period when everyday life does not have mental and physical limitations) to get closer the average life span to keep personal dignity and to spend the happy old age. Relationship between aging and stress has two points of view. One has mental and physical disorder by decreasing stress tolerance with aging. The other is to accelerate aging by excessive stress. This special issue includes four papers about; (1) changes in social roles and relationships and stress by aging, (2) sleep and health promotion for the elderly, (3) too much sitting among older adults, (4) relationship between vitamin D and stress.