title: Yearlong physical activity and depressive symptoms in older Japanese adults: cross-sectional data from the Nakanojo study.
abstract: OBJECTIVE
  The objective of this study was to investigate associations between accelerometer measurements of physical activity and psychosocial variables in older people.
  
  
  METHODS
  Subjects were 184 Japanese aged 65-85 years. An accelerometer provided step count and physical activity intensity data throughout each 24-hour period for 1 year. At the end of the year, anxiety, depression, and cognitive function were assessed.
  
  
  RESULTS
  Controlling for age, the daily number of steps, and the daily duration of moderate-intensity physical activity showed significant negative correlations with depressive mood.
  
  
  CONCLUSIONS
  A depressive mood is associated with the quantity and quality of habitual physical activity.
authors.affiliation: Department of Psychosomatic Medicine, Faculty of Medicine, The University of Tokyo, Tokyo, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Yoshiuchi
authors.forename: Rika
authors.initials: R
authors.lastname: Nakahara
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kumano
authors.forename: Tomifusa
authors.initials: T
authors.lastname: Kuboki
authors.forename: Fumiharu
authors.initials: F
authors.lastname: Togo
authors.forename: Eiji
authors.initials: E
authors.lastname: Watanabe
authors.forename: Akitomo
authors.initials: A
authors.lastname: Yasunaga
authors.forename: Hyuntae
authors.initials: H
authors.lastname: Park
authors.forename: Roy J
authors.initials: RJ
authors.lastname: Shephard
authors.forename: Yukitoshi
authors.initials: Y
authors.lastname: Aoyagi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology; D001007:Anxiety / Q000175:diagnosis / Q000453:epidemiology; D044466:Asian People; D002391:Catchment Area, Health; D003072:Cognition Disorders / Q000175:diagnosis / Q000453:epidemiology; D003430:Cross-Sectional Studies; D003863:Depression / Q000175:diagnosis* / Q000453:epidemiology* / Q000523:psychology; D015444:Exercise; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D009043:Motor Activity; D009483:Neuropsychological Tests; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D013997:Time Factors