title: Hormonal predisposition to menstrual dysfunction in collegiate dance students.
abstract: OBJECTIVE
  To evaluate the effect of dance training on menstrual function in teenage dance students and to identify risk factors associated with menstrual dysfunction.
  
  
  METHODS
  Dance students from a collegiate school of performing arts were recruited when they were first admitted to the school. Basic epidemiological data and menstrual history were gathered using a structured questionnaire. The subjects' self image appraisal was scored utilizing the Offer Self Image Questionnaire. Anthropometric measurements, body fat percentages and hormonal profiles were measured. The subjects were followed up after 12 months of intensive dance training, and the menstrual pattern, self image scoring and fat composition assays were repeated.
  
  
  RESULTS
  A total of 50 students completed the study. The mean age was 18.9 years (s.d. 1.86). While all were eumenorrheic at first assessment, eight were amenorrheic and eight were oligomenorrheic at the second assessment, giving an incidence of menstrual dysfunction of 32%. A general reduction in weight and body fat composition was observed after training. Those with menstrual dysfunction did not differ from those that remained eumenorrheic in their basic anthropometric parameters, nor was the serial change in these parameters in the second assessment different between the two groups. Psychological assessment scores also showed an identical trend. All hormonal values were within the normal range, but the group with menstrual dysfunction showed a significantly higher LH/FSH ratio (p=0.012) and DHEAS levels (p=0.036) at the pre-training assessment while other hormonal parameters did not differ.
  
  
  CONCLUSIONS
  The incidence of menstrual dysfunction in adolescent dance students undergoing intensive training was high. Those with pre-existing hormonal predisposition prior to entering training appeared particularly at risk.
authors.affiliation: Department of Obstetrics and Gynaecology, United Christian Hospital, Kowloon, Hong Kong, China.
authors.forename: W W
authors.initials: WW
authors.lastname: To
authors.forename: M W
authors.initials: MW
authors.lastname: Wong
authors.forename: I Y
authors.initials: IY
authors.lastname: Lam
mesh_terms: D000293:Adolescent; D000328:Adult; D000886:Anthropometry; D001823:Body Composition; D003615:Dancing; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood*; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood*; D008599:Menstruation Disturbances / Q000503:physiopathology*; D010809:Physical Fitness; D012307:Risk Factors; D013315:Stress, Psychological
chemical_list: D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone