title: Saliva testosterone and heart rate variability in the professional symphony orchestra after "public faintings" of an orchestra member.
abstract: Musicians are sensitive to changes in their work environment. A 2-year longitudinal study with repeated observations was performed in two professional symphony orchestras. A representative sample from each one of them was selected, 15 and 16 members respectively. In one of them a wind player fainted twice in front of the audience shortly preceding and coinciding with the start of the study. Changes in two indicators that reflect regenerative/anabolic and parasympathetic tone, saliva testosterone concentration (STC) and very low-frequency power (VLFP) in heart rate variability were followed in relation to this dramatic change. Saliva samples and 24-h ECG heart rate variability recordings were collected on five occasions every 6 months during a 2-year period. No changes were seen in the control orchestra whereas the levels showed a pronounced rise in the intervention orchestra during the first part of the study, starting from low levels. VLFP showed a similar pattern, with initially low and then rising level in the intervention orchestra and higher stable level in the other group. In the total study group, a rise in STC over the whole observation period was significantly correlated with increase in VLFP and also significantly correlated with a decrease in low/high-frequency power ratio in heart rate variability. The changes observed in the anabolic/regenerative STC and the parasympathetically influenced VLFP may reflect changes in the work environment associated with the faintings.
authors.affiliation: National Institute for Psychosocial Medicine, P.O. Box 230, 17177 Stockholm, Sweden. tores.theorell@ipm.ki.se
authors.forename: Töres
authors.initials: T
authors.lastname: Theorell
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Liljeholm-Johansson
authors.forename: Helena
authors.initials: H
authors.lastname: Björk
authors.forename: Mats
authors.initials: M
authors.lastname: Ericson
mesh_terms: D002940:Circadian Rhythm; D005260:Female; D005500:Follow-Up Studies; D006126:Group Processes; D006339:Heart Rate; D006801:Humans; D008016:Life Change Events; D008297:Male; D009146:Music; D012463:Saliva / Q000737:chemistry*; D013315:Stress, Psychological / Q000503:physiopathology* / Q000523:psychology; D013575:Syncope / Q000523:psychology*; D013739:Testosterone / Q000032:analysis*
chemical_list: D013739:Testosterone