title: A point of discontinuity on the heart rate curve appears in the early stage of exercise.
abstract: When measured continuously, the heart rate often appears to hesitate in its elevation momentarily in the early stage of exercise. This phenomenon was called tentatively "a point of discontinuity on a heart rate curve", and was observed in 19 out of 30 healthy subjects. The point appeared when the heart rate reached 87.8 +/- 2.9% (88.3 +/- 2.6% for athletes and 87.4 +/- 3.5% for nonathletes) of the plateau level. The precise cause of the phenomenon was undetermined, however was considered to be normal physiological activities but to be cardiac abnormalities of subjects.
authors.affiliation: Research Center for Sports Science, Kyoto University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Imachi
authors.forename: M
authors.initials: M
authors.lastname: Man-i
mesh_terms: D000328:Adult; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006339:Heart Rate; D006801:Humans; D008297:Male; D013177:Sports