Female elite athletes exhibited significantly shorter QTc dispersion than male athletes (39.2 vs. 45.3 ms, p<0.0001), while vigorous static exercise training independently prolonged QT variables.
Cross-Sectional (n=253)
Does gender and type of sports training affect QT variables in young elite athletes compared to non-athletes?
Gender and the type of sports training, particularly vigorous static exercise, independently affect QT variables and may prolong them in young elite athletes.
Absolute Event Rate: 39.2% vs 45.3%
p-value: p=<0.0001
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.
Omiya et al. (Wed,) conducted a cross-sectional in Healthy elite athletes (n=253). Sports training (endurance vs static) vs. Healthy non-athletes was evaluated on QTc dispersion (QTcD) in female vs male athletes (p=<0.0001). Female elite athletes exhibited significantly shorter QTc dispersion than male athletes (39.2 vs. 45.3 ms, p<0.0001), while vigorous static exercise training independently prolonged QT variables.
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