As old as you feel. How your 'age identity' influences aging.
D000368:Aged; D000375:Aging / Q000523:psychology*; D001294:Attitude to Health; D015444:Exercise; D005260:Female; D006240:Happiness; D015438:Health Behavior; D006801:Humans; D007398:Interpersonal Relations; D008875:Middle Aged; D010549:Personal Satisfaction; D012649:Self Concept