title: [Certain indices of the rhythm of heart contractions during the training of ship navigators].
mesh_terms: D006339:Heart Rate; D006801:Humans; D007858:Learning / Q000502:physiology*; D009326:Naval Medicine
vernacular_title: Nekotorye pokazateli ritma serdechnykh sokrashcheniĭ sudovoditeleĭ v protsesse obucheniia.