{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T04:05:13Z","timestamp":1773288313897,"version":"3.50.1"},"reference-count":30,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2019,11,7]],"date-time":"2019-11-07T00:00:00Z","timestamp":1573084800000},"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>This study aimed to compare the acute effects of hypertrophic (HYP) and maximum strength (MAX) loadings on heart rate variability (HRV) and to compare possible loading-specific alterations with other markers of recovery. Ten young men with strength training experience performed two leg press loadings (HYP: five times 10 repetitions at 70% of one repetition maximum (1RM) with 2 minutes inter-set rest; MAX: 15 times one repetition at 100% of 1RM with 3 minutes inter-set rest) in a randomized order. The root mean square of successive differences statistically decreased after both protocols (HYP: 65.7 \u00b1 26.6 ms to 23.9 \u00b1 18.7 ms, p = 0.026; MAX: 77.7 \u00b1 37.0 ms to 55.3 \u00b1 22.3 ms, p = 0.049), while the frequency domains of HRV remained statistically unaltered. The low frequency (LF) band statistically increased at 48h post-MAX only (p = 0.033). Maximal isometric voluntary contraction (MVC) statistically decreased after HYP (p = 0.026) and returned to baseline after 24h of recovery. Creatine kinase (CK) statistically increased above baseline at 1h post-loadings (HYP p = 0.028; MAX p = 0.020), returning to baseline at 24h post. Our findings indicate no distinct associations between changes in HRV and MVC or CK.<\/jats:p>","DOI":"10.3390\/ijerph16224353","type":"journal-article","created":{"date-parts":[[2019,11,7]],"date-time":"2019-11-07T11:17:25Z","timestamp":1573125445000},"page":"4353","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Can Heart Rate Variability Determine Recovery Following Distinct Strength Loadings? A Randomized Cross-Over Trial"],"prefix":"10.3390","volume":"16","author":[{"given":"Antonia","family":"Thamm","sequence":"first","affiliation":[{"name":"Department of Molecular and Cellular Sports Medicine, German Sport University, 50933 Cologne, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4415-5421","authenticated-orcid":false,"given":"Nils","family":"Freitag","sequence":"additional","affiliation":[{"name":"Department of Molecular and Cellular Sports Medicine, German Sport University, 50933 Cologne, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5515-3694","authenticated-orcid":false,"given":"Pedro","family":"Figueiredo","sequence":"additional","affiliation":[{"name":"Portugal Football School, Portuguese Football Federation, 1495-433 Oeiras, Portugal"},{"name":"Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, University Institute of Maia, ISMAI, 4475-690 Maia, Portugal"}]},{"given":"Kenji","family":"Doma","sequence":"additional","affiliation":[{"name":"College of Healthcare Sciences, James Cook University, Townsville 4811, Australia"}]},{"given":"Christoph","family":"Rottensteiner","sequence":"additional","affiliation":[{"name":"Firstbeat Technologies, 40100 Jyv\u00e4skyl\u00e4, Finland"}]},{"given":"Wilhelm","family":"Bloch","sequence":"additional","affiliation":[{"name":"Department of Molecular and Cellular Sports Medicine, German Sport University, 50933 Cologne, Germany"}]},{"given":"Moritz","family":"Schumann","sequence":"additional","affiliation":[{"name":"Department of Molecular and Cellular Sports Medicine, German Sport University, 50933 Cologne, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2019,11,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2061","DOI":"10.1249\/MSS.0b013e3182980125","article-title":"Evidence of parasympathetic hyperactivity in functionally overreached athletes","volume":"45","author":"Pichon","year":"2013","journal-title":"Med. 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