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Heart rate variability changes from traditional vs. ultra\u2013short-term recordings in relation to preseason training load and performance in futsal players. <jats:italic toggle=\"yes\">J Strength Cond Res<\/jats:italic> 34(10): 2974\u20132981, 2020\u2014The aims of this study were to analyze heart rate variability (HRV) changes in futsal players during preseason training using both \u201ccriterion\u201d (10-minute) and ultra-shortened (2-minute) measures, and to determine whether they were related to changes in the Yo-Yo Intermittent Recovery Test, level 1 (Yo-Yo IR1) performance and accumulated training load (TL). Eleven male competitive futsal players (age = 25.19 \u00b1 4.70 years; body mass = 73.15 \u00b1 11.70 kg; and height = 176.90 \u00b1 5.01 cm) volunteered for the study. Data collection took place during the first to the fourth weeks of preseason training. Training load was monitored with session ratings of perceived exertion. The total distance (TD) covered during the Yo-Yo IR1 was recorded during week 1 and week 4. Heart rate variability was measured through the log-transformed root mean square of successive normal-to-normal interval differences using the ultra-short analysis, with its weekly mean (lnRMSSD<jats:sub>M<\/jats:sub>) and coefficient of variation (lnRMSSD<jats:sub>CV<\/jats:sub>) recorded, and by means of the criterion method (weeks 1 and 4). lnRMSSD<jats:sub>M<\/jats:sub> was likely higher at week 4 compared with week 1 using both criterion and ultra-short recordings. Moderate-to-large correlations were found between changes in the lnRMSSD<jats:sub>M<\/jats:sub> and lnRMSSD<jats:sub>CV<\/jats:sub> values and changes in TL and TD (<jats:italic toggle=\"yes\">r<\/jats:italic> values ranged from \u22120.48 to 0.65). Changes in ultra-short HRV measures (i.e., increase in lnRMSSD<jats:sub>M<\/jats:sub> and decrease in lnRMSSD<jats:sub>CV<\/jats:sub>) during futsal preseason were associated with increased performance. The players who accumulated higher perceived TLs displayed smaller improvements in the Yo-Yo IR1 performance and HRV.<\/jats:p>","DOI":"10.1519\/jsc.0000000000002910","type":"journal-article","created":{"date-parts":[[2018,11,15]],"date-time":"2018-11-15T09:02:24Z","timestamp":1542272544000},"page":"2974-2981","source":"Crossref","is-referenced-by-count":31,"title":["Heart Rate Variability Changes From Traditional vs. Ultra\u2013Short-Term Recordings in Relation to Preseason Training Load and Performance in Futsal Players"],"prefix":"10.1519","volume":"34","author":[{"given":"F\u00e1bio Y.","family":"Nakamura","sequence":"first","affiliation":[{"name":"The College of Healthcare Sciences, James Cook University, Queensland, Australia;"},{"name":"Department of Medicine and Aging Sciences, \u201cG. d'Annunzio\u201d University of Chieti-Pescara, Chieti, Italy;"},{"name":"Research Center in Sport Sciences, Health and Human Development (CIDESD), Multicentric Research Group, Vila Real, Portugal;"}]},{"given":"Pedro","family":"Antunes","sequence":"additional","affiliation":[{"name":"Department of Sport Sciences, Research Center in Sport Sciences, Health and Human Development (CIDESD), University of Beira Interior, Covilh\u00e3, Portugal;"}]},{"given":"C\u00e9lia","family":"Nunes","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Center of Mathematics and Applications (CMA), University of Beira Interior, Covilh\u00e3, Portugal;"}]},{"given":"J\u00falio A.","family":"Costa","sequence":"additional","affiliation":[{"name":"Faculty of Sport, Center of Research, Education, Innovation and Intervention in Sport, University of Porto, Porto, Portugal; and"}]},{"given":"Michael R.","family":"Esco","sequence":"additional","affiliation":[{"name":"Department of Kinesiology, The University of Alabama, Tuscaloosa, Alabama"}]},{"given":"Bruno","family":"Travassos","sequence":"additional","affiliation":[{"name":"Department of Sport Sciences, Research Center in Sport Sciences, Health and Human Development (CIDESD), University of Beira Interior, Covilh\u00e3, Portugal;"}]}],"member":"276","reference":[{"key":"R1-20231016","doi-asserted-by":"crossref","first-page":"1038","DOI":"10.1123\/ijspp.2015-0672","article-title":"Quantification of seasonal-long physical load in soccer players with different starting status from the English Premier League: Implications for maintaining squad physical fitness","volume":"11","author":"Anderson","year":"2016","journal-title":"Int J Sports Physiol Perform"},{"key":"R2-20231016","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1123\/ijspp.1.1.50","article-title":"Making meaningful inferences about magnitudes","volume":"1","author":"Batterham","year":"2006","journal-title":"Int J Sports Physiol Perform"},{"key":"R3-20231016","doi-asserted-by":"crossref","first-page":"1461","DOI":"10.1007\/s40279-016-0484-2","article-title":"Monitoring athletic training status through autonomic heart rate regulation: A systematic Review and meta-analysis","volume":"46","author":"Bellenger","year":"2016","journal-title":"Sports Med"},{"key":"R4-20231016","doi-asserted-by":"crossref","first-page":"377","DOI":"10.1249\/00005768-198205000-00012","article-title":"Psychophysical bases of perceived exertion","volume":"14","author":"Borg","year":"1982","journal-title":"Med Sci Sports Exercise"},{"key":"R5-20231016","doi-asserted-by":"crossref","first-page":"474","DOI":"10.1519\/JSC.0b013e31829b56c4","article-title":"Methods for quantifying training in sprint kayak","volume":"28","author":"Borges","year":"2014","journal-title":"J Strength Cond Res"},{"key":"R6-20231016","doi-asserted-by":"crossref","first-page":"400","DOI":"10.1123\/ijspp.8.4.400","article-title":"Cardiac autonomic adaptations in elite Spanish soccer players during preseason","volume":"8","author":"Boullosa","year":"2013","journal-title":"Int J Sports Physiol Perform"},{"key":"R7-20231016","doi-asserted-by":"crossref","first-page":"365","DOI":"10.1519\/JSC.0b013e3181635b2e","article-title":"The 30-15 intermittent fitness test: Accuracy for individualizing interval training of young intermittent sport players","volume":"22","author":"Buchheit","year":"2008","journal-title":"J Strength Cond Res"},{"key":"R8-20231016","doi-asserted-by":"crossref","first-page":"73","DOI":"10.3389\/fphys.2014.00073","article-title":"Monitoring training status with HR measures: Do all roads lead to Rome?","volume":"5","author":"Buchheit","year":"2014","journal-title":"Front Physiol"},{"key":"R9-20231016","doi-asserted-by":"crossref","first-page":"H451","DOI":"10.1152\/ajpheart.00008.2006","article-title":"Cardiac parasympathetic regulation: Respective associations with cardiorespiratory fitness and training load","volume":"291","author":"Buchheit","year":"2006","journal-title":"Am J Physiol Heart Circ Physiol"},{"key":"R10-20231016","doi-asserted-by":"crossref","first-page":"1477","DOI":"10.1519\/JSC.0000000000001613","article-title":"Relationship between internal load indicators and changes on intermittent performance after the preseason in professional soccer players","volume":"31","author":"Campos-Vazquez","year":"2017","journal-title":"J Strength Cond Res"},{"key":"R12-20231016","doi-asserted-by":"crossref","first-page":"553","DOI":"10.1123\/ijspp.2014-0365","article-title":"Sensitivity of the Yo-Yo Intermittent Recovery Test and cardiac autonomic responses to training in futsal players","volume":"10","author":"de Freitas","year":"2015","journal-title":"Int J Sports Physiol Perform"},{"key":"R13-20231016","first-page":"535","article-title":"Ultra-short-term heart rate variability indexes at rest and post-exercise in athletes: Evaluating the agreement with accepted recommendations","volume":"13","author":"Esco","year":"2014","journal-title":"J Sports Sci Med"},{"key":"R14-20231016","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1007\/s00421-017-3759-x","article-title":"Ultra-shortened time-domain HRV parameters at rest and following exercise in athletes: An alternative to frequency computation of sympathovagal balance","volume":"118","author":"Esco","year":"2018","journal-title":"Eur Journal Applied Physiology"},{"key":"R15-20231016","doi-asserted-by":"crossref","first-page":"1950","DOI":"10.1080\/02640414.2014.969295","article-title":"Are the Yo-Yo intermittent recovery test levels 1 and 2 both useful? 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