Matsumura Martin E, Bucciarelli Maura, Perilli Gretchen
*Cardiovascular Research Institute, Lehigh Valley Health Network, Allentown, Pennsylvania; and †Department of Internal Medicine, Lehigh Valley Health Network, Allentown, Pennsylvania.
Clin J Sport Med. 2015 Nov;25(6):551-3. doi: 10.1097/JSM.0000000000000172.
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.
确定训练强度对非精英女性跑步者甲状腺功能的影响。
基于互联网对女性跑步者的病史、训练及比赛习惯进行调查。
共1222名年龄≥35岁的女性跑步者。
自我报告的甲状腺功能减退诊断以及训练和比赛细节。
149人（12.2%）报告患有甲状腺功能减退。训练强度或持续时间的各项特征，包括每周平均英里数、训练配速或累计跑步年限，均与甲状腺功能障碍无关。10岁及10岁以前开始跑步的女性比那些较晚开始跑步的女性更有可能报告患有甲状腺功能减退（4.7%对1.5%，P = 0.018）。
我们的结果不支持非精英女性长跑运动员中存在与过度训练相关的甲状腺功能减退这一概念，尽管我们的数据表明，10岁及10岁以前开始跑步的女性患甲状腺功能减退的几率增加了两倍。需要进一步研究来证实并确定这种关联的可能机制。
