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Near-Infrared Spectroscopy: More Accurate Than Heart Rate for Monitoring Intensity in Running in Hilly Terrain
University of Würzburg. (Nationellt Vintersportcentrum)
University of Salzburg, Salzburg, Austria.ORCID-id: 0000-0002-6685-1540
Mittuniversitetet, Fakulteten för humanvetenskap, Avdelningen för hälsovetenskap. (Nationellt Vintersportcentrum)
Mittuniversitetet, Fakulteten för humanvetenskap, Avdelningen för hälsovetenskap. (Nationellt Vintersportcentrum)
2017 (Engelska)Ingår i: International Journal of Sports Physiology and Performance, ISSN 1555-0265, E-ISSN 1555-0273, Vol. 12, nr 4, s. 440-447Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Purpose:

To 1) investigate the cardiorespiratory and metabolic response of trail running and 2) evaluate whether heart rate (HR) adequately reflects the exercise intensity or whether the tissue saturation index (TSI) could provide a more accurate measure when running in hilly terrain.

Methods:

Seventeen competitive runners (female: n=4, V’O2max: 55±6 mL·kg−1·min−1; male: n=13, V’O2max: 68±6 mL·kg−1·min−1) performed a time trial on an off-road trail course. The course was made up of two laps covering a total distance of 7 km and included six steep up- and downhill sections with an elevation gain of 486 m. All runners were equipped with a portable breath-by-breath gas analyzer, HR belt, global positioning system receiver and near-infrared spectroscopy (NIRS) device to measure the TSI.

Results:

During the trail run, the exercise intensity within the uphill and downhill sections was 94±2% and 91±3% of HRmax, 84±8% and 68±7% of V’O2max, respectively. The oxygen uptake (V’O2) increased within the uphill and decreased within the downhill sections (P< .01). While HR was unaffected by the altering slope conditions, the TSI was inversely correlated to the changes in V’O2 (r = - .70, P< .05).

Conclusions:

The HR was unaffected by the continuously changing exercise intensity, however, the TSI reflected the alternations in V’O2. Recently used exclusively for scientific purpose, this NIRS based variable may offer a more accurate alternative to HR to monitor running intensity in the future, especially for training and competition in hilly terrain.

Ort, förlag, år, upplaga, sidor
2017. Vol. 12, nr 4, s. 440-447
Nyckelord [en]
athlete, elite, tissue saturation, undulating terrain
Nationell ämneskategori
Idrottsvetenskap
Identifikatorer
URN: urn:nbn:se:miun:diva-29177DOI: 10.1123/ijspp.2016-0101ISI: 000403745600004PubMedID: 27396389Scopus ID: 2-s2.0-85038035888OAI: oai:DiVA.org:miun-29177DiVA, id: diva2:1043755
Projekt
TrailrunningTillgänglig från: 2016-10-31 Skapad: 2016-10-31 Senast uppdaterad: 2019-08-20Bibliografiskt granskad

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Stöggl, ThomasSwarén, MikaelBjörklund, Glenn

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