{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,5]],"date-time":"2026-11-05T03:09:24Z","timestamp":1793848164885,"version":"4.6.1"},"reference-count":20,"publisher":"Human Kinetics","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,1,1]]},"abstract":"<jats:p><jats:italic><jats:bold>Purpose:<\/jats:bold><\/jats:italic> The accuracy of heart rate (HR) measured with a wrist-worn photoplethysmography (PPG) monitor is altered during rest\u2013exercise and exercise\u2013rest transitions, which questions the validity of postexercise HR-recovery (HRR) parameters estimated from this device. <jats:italic><jats:bold>Methods:<\/jats:bold><\/jats:italic> Thirty participants (50% female) randomly performed two 13-minute sequences (3\u2032 rest, 5\u2032 submaximal-intensity exercise, and 5\u2032 passive recovery) on treadmill and bicycle ergometers. HR was measured concomitantly with a 10-lead electrocardiogram (ECG) and a wrist-worn PPG monitor (Polar Unite). HRR was assessed by calculating \u039460 (the difference between HR during exercise and HR 60\u00a0s after exercise cessation) and by fitting HRR data into a monoexponential model. <jats:italic><jats:bold>Results:<\/jats:bold><\/jats:italic> By focusing on \u039460 and <jats:italic>\u03c4<\/jats:italic> (the time constant of the monoexponential curve), levels of association (<jats:italic>r<\/jats:italic>) of the Unite versus the 10-lead ECG were high to very high (.73\u2009&lt;\u2009<jats:italic>r<\/jats:italic>\u2009&lt;\u2009.93), and coefficients of variation were &gt;20% (in absolute value), except for \u039460 in the bicycle ergometer condition (11.7%). In 97% of cases, the decrease in HR after exercise appeared later with the Unite. By adjusting the time window used for the analysis according to this time lag, coefficients of variation of \u039460 decreased below 10% in the bicycle ergometer condition. <jats:italic><jats:bold>Conclusions:<\/jats:bold><\/jats:italic> If a wrist-worn PPG monitor is used to assess HRR, we recommend performing the submaximal-intensity exercise on a bicycle ergometer and focusing on \u039460. Furthermore, to obtain a more accurate \u039460, the time lag between the end of the exercise and the effective decrease in HR should also be considered before the calculation.<\/jats:p>","DOI":"10.1123\/ijspp.2023-0120","type":"journal-article","created":{"date-parts":[[2023,10,6]],"date-time":"2023-10-06T18:17:09Z","timestamp":1696616229000},"page":"13-18","source":"Crossref","is-referenced-by-count":4,"title":["Accuracy of Heart-Rate-Recovery Parameters Assessed From a Wrist-Worn Photoplethysmography Monitor (Polar Unite)"],"prefix":"10.1123","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9307-8688","authenticated-orcid":true,"given":"Quentin","family":"Bretonneau","sequence":"first","affiliation":[{"name":"Facult\u00e9 des sciences du sport, Laboratoire MOVE (UR 20296), Universit\u00e9 de Poitiers, Poitiers, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Etienne","family":"Peruque-Gayou","sequence":"additional","affiliation":[{"name":"Facult\u00e9 des sciences du sport, Laboratoire MOVE (UR 20296), Universit\u00e9 de Poitiers, Poitiers, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Etienne","family":"Wolfs","sequence":"additional","affiliation":[{"name":"Facult\u00e9 des sciences du sport, Laboratoire MOVE (UR 20296), Universit\u00e9 de Poitiers, Poitiers, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2530-2676","authenticated-orcid":true,"given":"Laurent","family":"Bosquet","sequence":"additional","affiliation":[{"name":"Facult\u00e9 des sciences du sport, Laboratoire MOVE (UR 20296), Universit\u00e9 de Poitiers, Poitiers, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"suppl 2","key":"r1","series-title":"Sports Med","first-page":"S139","article-title":"Monitoring training load to understand fatigue in athletes","volume":"44","author":"Halson SL","year":"2014","unstructured":"Halson SL. 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