Table 2 Prevalence of training related ECG changes in the male and female marathon runners
|  | Men (n = 9897) | Women (n = 3182) | Total (n = 13,079) | P* |
|---|---|---|---|---|
n % | n % | n % | ||
Sinus bradycardia | 1544 15.60% | 375 11.79% | 1919 14.67% | < 0.01 |
Sinus arrhythmia | 790 7.98% | 268 8.42% | 1058 8.09% | > 0.05 |
Left ventricular high voltage | 400 4.04% | 8 0.25% | 408 3.12% | < 0.01 |
Right ventricular high voltage | 9 0.09% | 0 0.00% | 9 0.07% | > 0.05 |
Early Repolarization/ ST segment elevation | 130 1.31% | 33 1.04% | 163 1.25% | > 0.05 |
1° AVB | 39 0.39% | 4 0.13% | 43 0.33% | < 0.01 |
Mobitz type 1 (Wenckebach) 2° AVB | 1 0.01% | 0.00% | 1 0.01% |  |
Ectopic atrial or junctional rhythm | 5 0.05% | 1 0.03% | 6 0.05% | > 0.05 |
Incomplete RBBB | 118 1.19% | 9 0.28% | 127 0.97% | < 0.01 |
Any of the above findings | 2071 20.93% | 546 17.16% | 20.01% | < 0.01 |