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Cardiorespiratory, metabolic and hormonal responses during open-wheel indoor kart racing
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. Department of Sport Science University of Würzburg, Würzburg, Germany. (Swedish Winter Sports Research Centre)
Institute of Training Science and Sport Informatics, German Sport University, Cologne, Germany.
Institute of Training Science and Sport Informatics, German Sport University, Cologne, Germany.
Institute of Training Science and Sport Informatics, German Sport University, Cologne, Germany.
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2014 (English)In: Journal of Sports Medicine and Physical Fitness, ISSN 0022-4707, E-ISSN 1827-1928, Vol. 54, no 4, 475-480 p.Article in journal (Refereed) Published
Abstract [en]

AIM: This study aimed to quantify the cardiorespiratory, metabolic and hormonal responses of elite open-wheel indoor kart racers.METHODS: Ten male racers (age: 21±3 yrs; height: 1.92±0.06 m, body mass: 76.0±5.9 kg) participated in a racing tournament. Their peak oxygen uptake and heart rate were assessed by a ramp test (100 W, increase 30 W·min-1) in the laboratory. During the racing itself, the cardio-respiratory and accelerometer values were recorded and pre- and post-race levels of blood lactate and salivary cortisol were determined.RESULTS: The average peak values for all of the drivers with respect to oxygen uptake and heart rate were 4.5±0.8 L·min-1 (56.7±7.9 mL·min-1·kg-1) and 193±5 beats·min-1, respectively. Overall, 28.3±3.3 laps were completed during 30-min of racing. Acceleration forces for the entire test averaged 1.20±0.51 G (maximum: 3.30 G), declining from the first 10 min until the end of racing (P<0.03). The oxygen uptake (~20 mL·min-1·kg-1), heart rate (~133 beats·min-1), respiratory exchange ratio (~0.96) and ventilation (~70 L·min-1) observed indicated moderate cardio-respiratory responses. Blood lactate concentration was significantly higher after the race than before but remained at <2 mmol·L-1 (P<0.01; effect size: 1.62).CONCLUSION: There were no differences between salivary cortisol levels before and after the race (P<0.06; effect size: 0.49). Directly after the race, the drivers rated their perceived exertion on Borg’s scale as 11.1±1.3. The present data revealed that the psycho-physical exertion associated with a 30-min open-wheel indoor kart race is moderate.

Place, publisher, year, edition, pages
2014. Vol. 54, no 4, 475-480 p.
Keyword [en]
Automobiles, Heart rate, Lactates, Oxygen consumption
National Category
Sport and Fitness Sciences Physiology
Identifiers
URN: urn:nbn:se:miun:diva-23795ISI: 000343341800013PubMedID: 24721989Scopus ID: 2-s2.0-84922392292OAI: oai:DiVA.org:miun-23795DiVA: diva2:772091
Available from: 2014-12-16 Created: 2014-12-16 Last updated: 2016-09-22Bibliographically approved

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Sperlich, BillyHolmberg, Hans-Christer
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