Exercise-based cardiac rehabilitation is associated with a normalization of the heart rate performance curve deflection

Stefan Heber (Korresp. Autor*in), Marina Sallaberger-Lehner, Maria Hausharter, Ivo Volf, Helmuth Ocenasek, Harald Gabriel, Rochus Pokan

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

Abstract

The heart rate (HR) rises with increased power output, whereby in most healthy individuals, the slope of HR levels off with higher intensity. This corresponds to a downward deflection of the heart rate performance curve (HRPC). Conversely, in patients after myocardial infarction, an upward HRPC deflection is frequently observed that is especially pronounced in patients with compromised left ventricular ejection fraction. To investigate whether regular endurance training during cardiac rehabilitation might normalize HRPC, data of 128 male patients were analyzed. All patients performed three exercise tests: at baseline, after 6 weeks, and after 1 year. Ninety-six patients exercised regularly according to guidelines for 1 year (training group, TG), and 32 stopped after 6 weeks (control group, CG). Similarly, upward-deflected HRPCs were observed at baseline and after 6 weeks in both groups. After 1 year, TG patients had less upward-deflected HRPCs compared with CG ones, corresponding to a partial normalization. Greater changes in HRPC deflection were associated with larger improvements in cardiorespiratory fitness. Our results might indicate improved myocardial function due to long-term rehabilitation. Further, HRPC alterations over time should be considered when prescribing exercise intensities using a target HR, as deflection flattening might render the intensity of corresponding exercise insufficient.

OriginalspracheEnglisch
Seiten (von - bis)1364-1374
Seitenumfang11
FachzeitschriftScandinavian Journal of Medicine & Science in Sports
Jahrgang29
Ausgabenummer9
Frühes Online-Datum10 Mai 2019
DOIs
PublikationsstatusVeröffentlicht - Sept. 2019

ÖFOS 2012

  • 305908 Sportmedizin
  • 303028 Sportwissenschaft

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