Relationship Between Training Intensity and Volume and Hypothyroidism Among Female Runners

Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine
Martin E MatsumuraGretchen Perilli

Abstract

To determine the effect of training intensity on thyroid function among female nonelite runners. Internet-based survey of medical history and training and racing habits of female runners. A total of 1222 female runners aged ≥35 years. Self-reported diagnosis of hypothyroidism and details of training and racing. Hypothyroidism was reported by 149 (12.2%). No characteristics of training intensity or duration, including average miles per week, training pace, or years of accumulated running were associated with thyroid dysfunction. Females who began running at or before age 10 were more likely to report a diagnosis of hypothyroidism versus those who began running at an older age (4.7% vs 1.5%, P = 0.018). Our results do not support the concept of overtraining-related hypothyroidism among nonelite female distance runners although our data demonstrated a 3-fold increase in hypothyroidism among those who began a career at or before age 10. Further study is required to confirm and determine a possible mechanism of this association.

References

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Mar 11, 2003·Thyroid : Official Journal of the American Thyroid Association·Zubair BalochUNKNOWN Guidelines Committee, National Academy of Clinical Biochemistry
Sep 21, 2006·The Journal of Clinical Endocrinology and Metabolism·Eero KajantieJohan G Eriksson
Nov 5, 2008·Medicine and Science in Sports and Exercise·Michelle T BarrackJeanne F Nichols
Jan 26, 2012·Lancet·David S Cooper, Bernadette Biondi

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Citations

Dec 14, 2019·Current Sports Medicine Reports·Krista G Austin, Steven Petak
Feb 23, 2020·Pharmacological Research : the Official Journal of the Italian Pharmacological Society·Niki KatsikiUNKNOWN International Lipid Expert Panel (ILEP)
Feb 7, 2020·Current Sports Medicine Reports·D Enette Larson-Meyer, Demetre E Gostas

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