Electrocardiographic observations on athletes before and after a season of physical training

Electrocardiographic T wave changes with heavy exercise

“…The increase in the amplitude of the T wave resulting from ten weeks of strenuous cross-country training agreed with previous findings (Tuttle and Korns 1941, Wolf 1953, Beckner and Winsor 1954, Cureton 1958, Rose and Dunn 1964, and Pioletman and Miller 1968. The slight reduction in the T wave amplitude from T-2 to T-3 in supine rest and the very slight position gains in the remaining conditions are supported by the findings of Cureton (1958).…”

“…Positive changes in the electrocardiographic T wave accompanying exercise are well established (Tuttle andKorns 1941 andBeckner andWinsor 1954). Reduction in T wave amplitude or its inversion are considered pathological signs of coronary insufficiency (Seneback 1946).…”

Effect of training and wheat germ oil on the precordial T wave of middle-aged men

“…The most noticeable change in the ECG has been in the T wave, which has been used to designate ventricular repolarization (Guyton, 1966). Increases in the amplitude of the T wave with training are well documented (Tuttle and Korns, 1941;Wolf, 1953;Beckner and Winsor, 1954;Cureton, 1958;Rose and Dunn, 1964) in both athletes (Bedner and Winsor, 1954; Rose and Dunn, 1964) and middle-aged subjects (Cureton, 1958). However, it has been indicated (Cureton, 1958) that if training is too strenuous and/or prolonged the T wave amplitude may decrease.…”

“…Primary evidence has been the positive alterations in the electrocardiogram (Tuttle and Korns, 1941;Wolf, 1953;Lloyd-Thonms, 1961). The most noticeable change in the ECG has been in the T wave, which has been used to designate ventricular repolarization (Guyton, 1966).…”

Heart

“…Serial electrocardiographic stud-ies during athletic training were made during one season on forty eight subjects. Of these, four showed minor changes of obscure significance (26). Studies On normal humans and patients with cardiac disease breathing gas mixtures containing variable proportions of oxygen, carbon dioxide, and nitrogen have indicated that addition of 3 per cent carbon dioxide to low oxygen mixtures tends to prevent the manifestation of the signs of partial anoxia upon the heart (27).…”