title: Actigraphy quantifies reduced voluntary physical activity in women with primary dysmenorrhea.
abstract: We assessed whether an activity data logger was able to detect and measure the reduced physical activity reported by women with moderate to severe primary dysmenorrhea. Twelve young women with a history of primary dysmenorrhea and 12 young women without a history of dysmenorrhea wore an activity data logger on their hip for 3 days when menstruating and for 3 matched days of the week when not menstruating. A visual analog scale was use to assess intensity of pain. When menstruating, the women with a history of primary dysmenorrhea, compared with when they were not menstruating, were significantly less active by about 40% on their day of worst pain (P < .001), day of intermediate pain (P < .001), and day of least pain (P < .001). There was no significant difference in the voluntary physical activity of the group on the 3 menstrual days. The women without a history of dysmenorrhea experienced mild menstrual pain but no significant decrease in physical activity (P = .82). We show that data loggers are able to detect and quantify the decrease in physical activity reported by the women with a history of moderate to severe dysmenorrhea and that menstrual pain but not menstruation itself was associated with decreased voluntary physical activity.
  
  
  CONCLUSIONS
  We have shown that a miniature activity data logger, when worn on the hip of women with a history of dysmenorrhea, detected a 40% decrease in physical activity when the women were experiencing moderate to severe primary dysmenorrhea. Actigraphy is a useful tool for measuring pain-related debilitation and its management.
authors: Brain Function Research Group, School of Physiology, University of Witwatersrand, Johannesburg, South Africa. Ingrid.Chantler@wits.ac.za
authors: Ingrid
authors: I
authors: Chantler
authors: Duncan
authors: D
authors: Mitchell
authors: Andrea
authors: A
authors: Fuller
mesh_terms: D000328:Adult; D004412:Dysmenorrhea / Q000473:pathology / Q000503:physiopathology* / Q000523:psychology; D005260:Female; D006615:Hip / Q000503:physiopathology; D006801:Humans; D008598:Menstruation / Q000502:physiology* / Q000523:psychology; D010147:Pain Measurement / Q000379:methods; D011597:Psychomotor Performance / Q000502:physiology*; D012720:Severity of Illness Index; D055815:Young Adult