{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T15:24:45Z","timestamp":1791473085097,"version":"4.3.4"},"reference-count":63,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2023,3,2]],"date-time":"2023-03-02T00:00:00Z","timestamp":1677715200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"ANID Proyecto Fondecyt Iniciaci\u00f3n","award":["N\u00b011220116"],"award-info":[{"award-number":["N\u00b011220116"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Background: Currently, and to the best of our knowledge, there is no standardized protocol to measure the effect of low- to moderate-intensity physical exercise on autonomic modulation focused in older people. Aim: Validate a test\u2013retest short-term exercise protocol for measuring the autonomic response through HRV in older people. Methods: A test\u2013retest study design was used. The participants were selected through intentional non-probabilistic sampling. A total of 105 older people (male: 21.9%; female: 78.1%) were recruited from a local community. The assessment protocol evaluated HRV before and immediately after the 2-min step test. It was performed twice on the same day, considering a time of three chronological hours between the two measurements. Results: The posterior distribution of estimated responses in the Bayesian framework suggests moderate to strong evidence favoring a null effect between measurements. In addition, there was moderate to robust agreement between heart rate variability (HRV) indices and assessments, except for low frequency and very low frequency, which showed weak agreement. Conclusions: Our results provide moderate to strong evidence for using HRV to measure cardiac autonomic response to moderate exercise, suggesting that it is sufficiently reliable to show similar results to those shown in this test\u2013retest protocol.<\/jats:p>","DOI":"10.3390\/ijerph20054456","type":"journal-article","created":{"date-parts":[[2023,3,2]],"date-time":"2023-03-02T03:54:56Z","timestamp":1677729296000},"page":"4456","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Validity and Reliability of Short-Term Heart Rate Variability Parameters in Older People in Response to Physical Exercise"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7291-247X","authenticated-orcid":false,"given":"Mat\u00edas","family":"Castillo-Aguilar","sequence":"first","affiliation":[{"name":"Centro Asistencial de Docencia e Investigaci\u00f3n (CADI-UMAG), University of Magallanes, Punta Arenas 6200000, Chile"},{"name":"Kinesiology Department, University of Magallanes, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-6577-8620","authenticated-orcid":false,"given":"Mat\u00edas","family":"Mabe Castro","sequence":"additional","affiliation":[{"name":"Centro Asistencial de Docencia e Investigaci\u00f3n (CADI-UMAG), University of Magallanes, Punta Arenas 6200000, Chile"},{"name":"School of Medicine, University of Magallanes, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6663-2153","authenticated-orcid":false,"given":"Diego","family":"Mabe Castro","sequence":"additional","affiliation":[{"name":"Centro Asistencial de Docencia e Investigaci\u00f3n (CADI-UMAG), University of Magallanes, Punta Arenas 6200000, Chile"},{"name":"Kinesiology Department, University of Magallanes, Punta Arenas 6200000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3948-8280","authenticated-orcid":false,"given":"Pablo","family":"Vald\u00e9s-Badilla","sequence":"additional","affiliation":[{"name":"Department of Physical Activity Sciences, Faculty of Education Sciences, Universidad Cat\u00f3lica del Maule, Talca 3480094, Chile"},{"name":"Carrera de Entrenador Deportivo, Escuela de Educaci\u00f3n, Universidad Vi\u00f1a del Mar, Vi\u00f1a del Mar 2520000, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5219-5896","authenticated-orcid":false,"given":"Tom\u00e1s","family":"Herrera-Valenzuela","sequence":"additional","affiliation":[{"name":"Department of Physical Activity, Sports and Health Sciences, Faculty of Medical Sciences, Universidad de Santiago de Chile (USACH), Santiago de Chile 9170022, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7001-9004","authenticated-orcid":false,"given":"Eduardo","family":"Guzm\u00e1n-Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Escuela de Kinesiolog\u00eda, Facultad de Salud, Universidad Santo Tom\u00e1s, Talca 3480094, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8465-5471","authenticated-orcid":false,"given":"Morin","family":"Lang","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Sciences and Human Movement, Faculty of Health Sciences, Universidad de Antofagasta, Antofagasta 1270300, Chile"},{"name":"Center for Research in Physiology and Medicine of Altitude, Biomedical Department, Faculty of Health Sciences, Universidad de Antofagasta, Antofagasta 1270300, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oscar","family":"Ni\u00f1o M\u00e9ndez","sequence":"additional","affiliation":[{"name":"Facultad de Ciencias del Deporte y la Educaci\u00f3n F\u00edsica, Universidad de Cundinamarca, Bogot\u00e1 252211, Colombia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9896-7062","authenticated-orcid":false,"given":"Cristian","family":"N\u00fa\u00f1ez-Espinosa","sequence":"additional","affiliation":[{"name":"Centro Asistencial de Docencia e Investigaci\u00f3n (CADI-UMAG), University of Magallanes, Punta Arenas 6200000, Chile"},{"name":"School of Medicine, University of Magallanes, Punta Arenas 6200000, Chile"},{"name":"Interuniversity Center for Healthy Aging, Chile 3480094, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"719","DOI":"10.1007\/s40279-019-01097-7","article-title":"Exercise Frequency Determines Heart Rate 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