{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T02:09:49Z","timestamp":1792202989844,"version":"4.4.0"},"reference-count":71,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2024,9,19]],"date-time":"2024-09-19T00:00:00Z","timestamp":1726704000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["European Journal of Sport Science"],"published-print":{"date-parts":[[2024,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The study explores the validity of the nonlinear index alpha 1 of detrended fluctuation analysis (DFAa1) of heart rate (HR) variability for exercise prescription in prolonged constant load running bouts of different intensities. 21 trained endurance athletes (9\u00a0w and 12\u00a0m) performed a ramp test for ventilatory threshold (vVT1 and vVT2) and DFAa1\u2010based (vDFAa1\u20101 at 0.75 and vDFAa1\u20102 at 0.5) running speed detection as well as two 20\u2010min running bouts at vDFAa1\u20101 and vDFAa1\u20102 (20\u2010vDFAa1\u20101 and 20\u2010vDFAa1\u20102), in which HR, oxygen consumption (VO\n                    <jats:sub>2<\/jats:sub>\n                    ), respiratory frequency (RF), DFAa1, and blood lactate concentration [La\u2010] were assessed. 20\u2010vDFAa1\u20102 could not be finished by all participants (finisher group (FG),\n                    <jats:italic>n<\/jats:italic>\n                    \u00a0=\u00a015 versus exhaustion group (EG),\n                    <jats:italic>n<\/jats:italic>\n                    \u00a0=\u00a06). Despite similar mean external loads of vDFAa1\u20101 (10.6\u00a0\u00b1\u00a01.9\u00a0km\/h) and vDFAa1\u20102 (13.1\u00a0\u00b1\u00a02.4\u00a0km\/h) for all participants compared to vVT1 (10.8\u00a0\u00b1\u00a01.7\u00a0km\/h) and vVT2 (13.2\u00a0\u00b1\u00a01.9\u00a0km\/h), considerable differences were present for 20\u2010vDFAa1\u20102 in EG (15.2\u00a0\u00b1\u00a02.4\u00a0km\/h). 20\u2010vDFAa1\u20101 and 20\u2010DFAa1\u20102 yielded significant differences in FG for HR (76.2\u00a0\u00b1\u00a05.7 vs. 86.4\u00a0\u00b1\u00a05.9 %HR\n                    <jats:sub>PEAK<\/jats:sub>\n                    ), VO\n                    <jats:sub>2<\/jats:sub>\n                    (62.1\u00a0\u00b1\u00a05.0 vs. 77.5\u00a0\u00b1\u00a08.6 %VO\n                    <jats:sub>2PEAK<\/jats:sub>\n                    ), RF (40.6\u00a0\u00b1\u00a011.3 vs. 46.1\u00a0\u00b1\u00a09.8\u00a0bpm), DFA\u2010a1 (0.86\u00a0\u00b1\u00a00.23 vs. 0.60\u00a0\u00b1\u00a00.15), and [La\u2010] (1.41\u00a0\u00b1\u00a00.45 vs. 3.34\u00a0\u00b1\u00a02.24\u00a0mmol\/L). Regarding alterations during 20\u2010vDFAa1\u20101, all parameters showed small changes for all participants, while during 20\u2010vDFAa1\u20102 RF and DFAa1 showed substantial alterations in FG (RF: 15.6% and DFAa1: \u221212.8%) and more pronounced in EG (RF: 20.1% and DFAa1: \u221235.9%). DFAa1\u2010based exercise prescription from incremental testing could be useful for most participants in prolonged running bouts, at least in the moderate to heavy intensity domain. In addition, an individually different increased risk of overloading may occur in the heavy to severe exercise domains and should be further elucidated in the light of durability and decoupling assessment.\n                  <\/jats:p>","DOI":"10.1002\/ejsc.12175","type":"journal-article","created":{"date-parts":[[2024,9,20]],"date-time":"2024-09-20T01:40:28Z","timestamp":1726796428000},"page":"1539-1551","source":"Crossref","is-referenced-by-count":12,"title":["Correlation properties of heart rate variability for exercise prescription during prolonged running at constant speeds: A randomized cross\u2010over trial"],"prefix":"10.1002","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5610-6013","authenticated-orcid":false,"given":"Thomas","family":"Gronwald","sequence":"first","affiliation":[{"name":"Institute of Interdisciplinary Exercise Science and Sports Medicine MSH Medical School Hamburg  Hamburg Germany"},{"name":"G\u2010Lab Faculty of Applied Sport Sciences and Personality BSP Business and Law School  Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonie","family":"Horn","sequence":"additional","affiliation":[{"name":"Center for Sports and Physical Education Faculty of Human Sciences Julius\u2010Maximilians\u2010University Wuerzburg  Wuerzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcelle","family":"Schaffarczyk","sequence":"additional","affiliation":[{"name":"Institute of Interdisciplinary Exercise Science and Sports Medicine MSH Medical School Hamburg  Hamburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olaf","family":"Hoos","sequence":"additional","affiliation":[{"name":"Center for Sports and Physical Education Faculty of Human Sciences Julius\u2010Maximilians\u2010University Wuerzburg  Wuerzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,9,19]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1152\/jappl.1986.60.6.2020"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/s0025\u20106196(12)62272\u20101"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1123\/ijspp.2015\u20100573"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41598\u2010023\u201035717\u20100"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1249\/mss.0000000000002976"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13102\u2010022\u201000538\u20107"},{"issue":"2","key":"e_1_2_12_8_1","first-page":"117","article-title":"Lactic Threshold vs Ventilatory Threshold During a Ramp Test on a Cycle Ergometer","volume":"37","author":"Chicharro J. 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