{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T16:07:27Z","timestamp":1780330047507,"version":"3.54.1"},"reference-count":35,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2019,5,28]],"date-time":"2019-05-28T00:00:00Z","timestamp":1559001600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2019,9]]},"abstract":"<jats:p>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\u00a0weeks, and after 1\u00a0year. Ninety\u2010six patients exercised regularly according to guidelines for 1\u00a0year (training group, TG), and 32 stopped after 6\u00a0weeks (control group, CG). Similarly, upward\u2010deflected HRPCs were observed at baseline and after 6\u00a0weeks in both groups. After 1\u00a0year, TG patients had less upward\u2010deflected 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\u2010term 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.<\/jats:p>","DOI":"10.1111\/sms.13462","type":"journal-article","created":{"date-parts":[[2019,5,10]],"date-time":"2019-05-10T11:26:00Z","timestamp":1557487560000},"page":"1364-1374","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Exercise\u2010based cardiac rehabilitation is associated with a normalization of the heart rate performance curve deflection"],"prefix":"10.1111","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3398-0442","authenticated-orcid":false,"given":"Stefan","family":"Heber","sequence":"first","affiliation":[{"name":"Institute of Sport Science, Center for Sport Science and University Sports University of Vienna Vienna Austria"},{"name":"Institute for Physiology, Center for 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