[Arrhythmia in athletes during length diving]

On diving at a distance of 50 m by arresting their breathing, some male athletes were shown to develop cardiac arrhythmias which occurred at min 2 of a restorative period and entirely disappeared at the end of the second-fifth min. It is essential to make further studies of the impact of diving on the cardiac rhythm in athletes in order to elucidate how these disturbances should be regarded: abnormal or physiological.