Pichot, V Relation between heart rate variability and training load in middle-distance runners. [electronic resource] - Medicine and science in sports and exercise Oct 2000 - 1729-36 p. digital Publication Type: Journal Article ISSN: 0195-9131 Standard No.: 10.1097/00005768-200010000-00011 doi Subjects--Topical Terms: AdultAutonomic Nervous System--physiologyCase-Control StudiesElectrocardiographyExercise Tolerance--physiologyFatigueFourier AnalysisHeart Rate--physiologyHumansLongitudinal StudiesMaleProspective StudiesRunningSurveys and Questionnaires