title: Circadian rest-activity rhythm for maintenance of body shape.
abstract: A recently developed wearable device has gained attention in the area of self-discipline for the prevention of lifestyle-related diseases. The present study aimed to clarify the relationship between circadian rhythm and body shape change using actigraphy. Using a body shape vector, we classified 24 women in their 40s and 50s into 3 groups with different body shape changes. A circadian rhythm experiment was conducted on weekdays for 1 week with 24 healthy women. Amounts of activity of the non-dominant wrist and trunk, subjective evaluation of sleep quality, and subjective state of activity were surveyed. In order to maintain a constant body shape throughout life, a less sedentary lifestyle with more trunk movement during the day, getting adequate sleep at night, and having a varied sleep-wake cycle may be important factors.
authors.affiliation: Graduate School of Science and Engineering, Advanced Information Science and Engineering Major, Human Information Science Course, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, Shiga 525-8577, Japan. ci004067@ed.ritsumei.ac.jp
authors.forename: S
authors.initials: S
authors.lastname: Kume
authors.forename: N
authors.initials: N
authors.lastname: Tokumitsu
authors.forename: S
authors.initials: S
authors.lastname: Sakamoto
authors.forename: H
authors.initials: H
authors.lastname: Hagiwara
mesh_terms: D056044:Actigraphy / Q000379:methods*; D000328:Adult; D000465:Algorithms; D049628:Body Size / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D012146:Rest / Q000502:physiology*; D012890:Sleep / Q000502:physiology*