{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T20:53:19Z","timestamp":1792702399034,"version":"4.5.0"},"reference-count":24,"publisher":"ALUNA","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,12]]},"abstract":"<jats:p>Aim: Patients referred for cardiac rehabilitation after myocardial infarction (MI) often had a Covid-19 infection. To date, there is no evidence-based guidelines of cardiac rehabilitation in this group. The aim of the study was to assess cardiorespiratory fitness using the cardiopulmonary exercise test (CPET) in patients after MI and Covid-19 infection undergoing interval trainings(IT).\nMaterials and Methods: 30 patients mean age: 55.4\u00b112.2 years, after MI and Covid-19 infection up to 6 months before MI were included in the study (SG, study group). The control group (CG) consisted of 30 men without a history of Covid-19. All subjects completed a series of 24 IT on a cycloergometer and 30 minutes of breathing exercises after the IT.CPET was performed before and after rehabilitation.\nResults: After rehabilitation, a significant increase in the following parameters based on CPET was achieved in the SG \u2013peak oxygen consumption( pVO2) 20.3\u00b14.8 vs. 23.4\u00b14.6 ml\/kg\/min, p&lt;0.001; oxygen pulse: 13.3\u00b13.4 vs. 14.4\u00b13.4 ml\/beat, p&lt;0.001; respiratory exchange ratio(RER) 1.12\u00b10.1 vs. 1.26\u00b10.1, p&lt;0.01;minute ventilaton(VE) 56.4\u00b119 vs. 71.2\u00b121.9 l\/min, p&lt;0.001;max voluntary ventilation(MVV) 106.3\u00b137.0 vs. 118.0\u00b128.2 l, p=0.02. The percentage of patients with severe and moderate symptoms of cardiorespiratory insufficiency was significantly reduced, respectively: 16.7% vs. 6.7% and 46.7% vs. 26.7%, p&lt;0.01.The percentage of patients with mildly reduced performance increased: 16.7% vs. 46.7%, p&lt;0.05. Patients from the CG had good physical performance at the beginning, which did not significantly improve after rehabilitation.\nConclusions: Interval trainings and breathing exercises were safe and significantly improved the cardiorespiratory fitness of patients with a history of myocardial infarction and Covid-19 infection.<\/jats:p>","DOI":"10.36740\/merkur202406102","type":"journal-article","created":{"date-parts":[[2025,2,15]],"date-time":"2025-02-15T13:02:16Z","timestamp":1739624536000},"page":"623-629","source":"Crossref","is-referenced-by-count":1,"title":["The beneficial impact of interval training on cardiorespiratory fitness in patients after myocardial infarction and Covid-19 undergoing early cardiac rehabilitation"],"prefix":"10.36740","volume":"52","author":[{"given":"Iwona","family":"Korzeniowska-Kubacka","sequence":"first","affiliation":[{"name":"Department of Coronary Artery Disease and Cardiac Rehabilitation , National Institute of Cardiology , Warsaw , Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Krzysztof","family":"Sadowski","sequence":"additional","affiliation":[{"name":"Department of Coronary Artery Disease and Cardiac Rehabilitation , National Institute of Cardiology , Warsaw , Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ewa","family":"Rydzewska","sequence":"additional","affiliation":[{"name":"Department of Coronary Artery Disease and Cardiac Rehabilitation , National Institute of Cardiology , Warsaw , Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edyta","family":"Smolis-B\u0105k","sequence":"additional","affiliation":[{"name":"Department of Coronary Artery Disease and Cardiac Rehabilitation , National Institute of Cardiology , Warsaw , Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ilona","family":"Kowalik","sequence":"additional","affiliation":[{"name":"CLINICAL RESEARCH SUPPORT CENTER, NATIONAL INSTITUTE OF CARDIOLOGY, WARSAW, POLAND"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rafa\u0142","family":"D\u0105browski","sequence":"additional","affiliation":[{"name":"Department of Coronary Artery Disease and Cardiac Rehabilitation , National Institute of Cardiology , Warsaw , Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"22436","published-online":{"date-parts":[[2024]]},"reference":[{"key":"ref0","doi-asserted-by":"publisher","unstructured":"1. 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