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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
BODY COMPOSITION, NUTRITION AND SUPPLEMENTATION
Wulff Helge E. 1, Melin A. 2, Waaddegaard M. 3, Kanstrup I.-L. 4
1 Department of Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark;
2 Team Danmarks Testcenter, Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, Copenhagen, Denmark;
3 Psychotherapeutic Center Stolpegaard, Eating Disorders Clinic, Copenhagen, Denmark;
4 Herlev Hospital, Department of Clinical Physiology and Nuclear Medicine, University of Copenhagen, Copenhagen, Denmark
AIM: Female endurance athletes suffering from low energy availability and reproductive hormonal disorders are at risk of low BMD. Muscle forces acting on bone may have a reverse itespecific effect. Therefore we wanted to test how BMD in female elite triathletes was associated to isokinetic peak torque (IPT) and reproductive hormone concentrations (RHC). A possible effect of oral contraceptives (OCON’s) is taken into consideration.
METHODS: Eight female elite triathletes (training 8-24 hrs/wk) and seven sedentary controls, age 21-37 years, participated. Total body and regional BMD (g.cm-2) were measured by DXA. IPT were measured during knee extension, and trunk extension and flexion (Nm). Serum RHC and biochemical bone markers were evaluated. Energy balance was estimated from 7-days training-and weighed food records.
RESULTS: Despite a high training volume, BMD in triathletes was not higher than in controls. In triathletes trunk flexion IPT, but not RHC, was a strong predictor of BMD in both total body and femur (0.70