NDLI: Influence of gender and types of sports training on QT variables in young elite athletes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Omiya, Kazuto Sekizuka, Hiromitsu Kida, Keisuke Suzuki, Kengo Akashi, Yoshihiro J. Ohba, Haruo Musha, Haruki
Spatial Coverage	Japan
Description	Country affiliation: Japan Author Affiliation: Omiya K ( a Department of Cardiology , St. Marianna University School of Medicine , Miyamae-ku, Kawasaki , Japan.)
Abstract	UNLABELLED: Influence of gender and sports training on QT variables such as QT interval and dispersion (QT dispersion: QTD) in young elite athletes were evaluated. Subjects included 104 male and 97 female Japanese elite athletes (mean age 21.6 years). Sports included basketball, fencing, gymnastics, judo, swimming, tennis, track and field and volleyball. Age-matched healthy non-athletes (32 men and 20 women) were enrolled as controls. QT measurements were manually obtained from a 12-lead resting electrocardiogram and QTD was calculated as the difference between the longest and shortest QT intervals. A corrected QT interval (QTc) was obtained using Bazett's formula. Subjects were divided into two groups; an endurance training group and a static training group on the basis of their training types. RESULTS: Maximum and minimum QTc were significantly longer in female athletes than in male athletes (max: 414.2 vs. 404.5 ms, min: 375.1 vs. 359.2 ms, p<0.0001 respectively), whereas QTc dispersion (QTcD) was shorter in female athletes than in male athletes (39.2 vs. 45.3 ms, p<0.0001). QTcD was significantly shorter in female athletes than in the female control group (39.2 vs. 45.2 ms, p<0.05). However, no statistically significant difference was observed between male athletes and the male control group. Male gymnasts exhibited significantly longer QTcD than the control group (p<0.01), but female gymnasts had significantly shorter QTcD than the control group (p<0.05). Maximum QTc intervals were prolonged in the male static training group compared with non-athletes, and QTcDs in the static training group were prolonged compared with the endurance training group. However, no significant difference was observed in the female group. In conclusion, both gender and different characteristics of sports training may affect QT variables even in young elite athletes. Vigorous static exercise training may independently prolong QT variables.
File Format	HTM / HTML
ISSN	17461391
Issue Number	Suppl 1
Volume Number	14
e-ISSN	15367290
Journal	European Journal of Sport Science
Language	English
Publisher	Taylor & Francis
Publisher Date	2014-01-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Physiology Discipline Sports Medicine Athletes Electrocardiography Classification Sports Physiology Adolescent Adult Analysis Of Variance Body Weights And Measures Case-control Studies Female Humans Japan Male Physical Endurance Young Adult Journal Article
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physical Therapy, Sports Therapy and Rehabilitation Sports Science

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