| Physiology of Ski Mountaineering Racing. | |
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MedLine Citation:
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PMID: 22012642 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The aim of this study was to quantify and describe the exercise intensity of ski mountaineering racing, and to identify the best physiological predictors of ski mountaineering racing. Before participating in the race in which heart rate (HR) and speed were continuously recorded, 10 trained ski-mountaineers performed a field maximal test to determine the first ventilatory threshold (VT (1)) and the respiratory compensation threshold (RCT) in order to establish 3 exercise intensity zones (Z1: below VT (1), Z2: between VT (1) and RCT, and Z3: above RCT). Energy cost (EC) of each subject was estimated on the HR/ V˙O(2) relationship obtained during the field maximal test. VT (1) and RCT threshold were equal to 84.2±3.0 and 94.5±1.7% of HR (max). Race time was significantly correlated with V˙O(2max) (r=-0.87), VT (1) (r=-0.82) and RCT (r=-0.85) expressed for body mass unit. The mean race time and the mean HR were 101±11 min and 93.4±1.8% of HR (max). The % race time spent in Z1, Z2 and Z3, were 7.0±4.8, 51.3±4.7 and 42.0±6.5%, respectively. The mean value of EC during the two uphill of the race was 14.3±2.6 J.kg (-1).m (-1). HR and speed decreased significantly during the second uphill whereas EC increased significantly by ∼15%. Data obtained in the present study represent the first qualitative description of physiology demand of ski mountaineering racing. The long period of time spent just below and above RCT suggest that ski-mountaineering can be viewed as one of the most strenuous endurance sports like cross-country skiing, running and off-road biking. In addition to high aerobic capacities, body mass seems to appear as a key factor given that performance in ski mountaineering is strongly correlated to relative common physiological variables. The changes of HR, speed and EC during the second uphill, which indicate the prevalence of fatigue, confirm the exhaustive character of ski mountaineering. |
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Authors:
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S Duc; J Cassirame; F Durand |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-19 |
Journal Detail:
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Title: International journal of sports medicine Volume: - ISSN: 1439-3964 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-10-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© Georg Thieme Verlag KG Stuttgart · New York. |
Affiliation:
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University of Perpignan - Departement de STAPS Font Romeu, Laboratory of Performance, Health & Altitude, Font Romeu, France. |
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| MeSH Terms | |
Descriptor/Qualifier:
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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