{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:05:56Z","timestamp":1760148356073,"version":"build-2065373602"},"reference-count":60,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2023,4,24]],"date-time":"2023-04-24T00:00:00Z","timestamp":1682294400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Interval training (IT) is a very efficient method. We aimed to verify the chronic effects of IT with different intensities on hemodynamic, autonomic and cardiorespiratory variables in the elderly. Twenty-four physically active elderly men participated in the study and were randomized into three groups: Training Group A (TGA, n = 8), Training Group B (TGB, n = 8) and control group (CG, n = 8). The TGA and TGB groups performed 32 sessions (48 h interval). TGA presented 4 min (55 to 60% of HRmax) and 1 min (70 to 75% of HRmax). The TGB training groups performed the same protocol, but performed 4 min at 45 to 50% HRmax and 1 min at 60 to 65% HRmax. Both training groups performed each set six times, totaling 30 min per session. Assessments were performed pre (baseline) after the 16th and 32nd intervention session. The CG performed only assessments. Hemodynamic, autonomic and cardiorespiratory (estimated VO2max) variables were evaluated. There were no significant differences between protocols and times (p &gt; 0.05). However, the effect size and percentage delta indicated positive clinical outcomes, indicating favorable responses of IT. IT may be a strategy to improve hemodynamic, autonomic and cardiorespiratory behavior in healthy elderly people.<\/jats:p>","DOI":"10.3390\/ijerph20095619","type":"journal-article","created":{"date-parts":[[2023,4,24]],"date-time":"2023-04-24T03:04:08Z","timestamp":1682305448000},"page":"5619","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Chronic Effects of Different Intensities of Interval Training on Hemodynamic, Autonomic and Cardiorespiratory Variables of Physically Active Elderly People"],"prefix":"10.3390","volume":"20","author":[{"given":"Leandro","family":"Sant\u2019Ana","sequence":"first","affiliation":[{"name":"Post Graduate Program in Physical Education, Federal University of Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil"},{"name":"Strength Training Studies and Research Laboratory, Federal University of Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7179-6814","authenticated-orcid":false,"given":"Diogo","family":"Monteiro","sequence":"additional","affiliation":[{"name":"ESECS, Polytechnic of Leiria, 2411-901 Leiria, Portugal"},{"name":"Life Quality Research Centre (CIEQV), 2040-413 Leiria, Portugal"},{"name":"Research Center in Sport, Health, and Human Development (CIDESD), 5001-801 Vila Real, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3526-0569","authenticated-orcid":false,"given":"Henning","family":"Budde","sequence":"additional","affiliation":[{"name":"Institute for Systems Medicine (ISM), Faculty of Human Sciences, Medical School Hamburg, University of Applied Science and Medical University, 20457 Hamburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aline","family":"Ribeiro","sequence":"additional","affiliation":[{"name":"Post Graduate Program in Physical Education, Federal University of Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil"},{"name":"Strength Training Studies and Research Laboratory, Federal University of Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3860-4630","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Vieira","sequence":"additional","affiliation":[{"name":"Post Graduate Program in Physical Education, Federal University of Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil"},{"name":"Strength Training Studies and Research Laboratory, Federal University of Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1866-553X","authenticated-orcid":false,"given":"Est\u00eav\u00e3o","family":"Monteiro","sequence":"additional","affiliation":[{"name":"Post Graduate Program in Physical Education, Federal University of Rio de Janeiro, Rio de Janeiro 21941-599, RJ, Brazil"},{"name":"Post Graduate Program in Rehabilitation Sciences, Augusto Motta University Center, Rio de Janeiro 20911-300, RJ, Brazil"},{"name":"Graduate Program in Physical Education, IBMR University Center, Rio de Janeiro 22631-002, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fabiana","family":"Scartoni","sequence":"additional","affiliation":[{"name":"Sport and Exercise Science Laboratory, Catholic University of Petr\u00f3polis, Petr\u00f3polis 25685-100, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8946-8467","authenticated-orcid":false,"given":"S\u00e9rgio","family":"Machado","sequence":"additional","affiliation":[{"name":"Departament of Sports Methods and Techniques, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil"},{"name":"Laboratory of Physical Activity Neuroscience, Neurodiversity Institute, Queimados 26325-020, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1594-4429","authenticated-orcid":false,"given":"Jeferson","family":"Vianna","sequence":"additional","affiliation":[{"name":"Post Graduate Program in Physical Education, Federal University of Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil"},{"name":"Strength Training Studies and Research Laboratory, Federal University of Juiz de Fora, Juiz de Fora 36036-900, MG, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,24]]},"reference":[{"key":"ref_1","unstructured":"(2016). 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