Combined metabolic gas analyser and dGPS analysis of performance in cross-country skiing
Deutscher übersetzter Titel: | Kombinierte Analyse der Leistungsfähigkeit beim Siklanglauf mittels metabolischem Gasanalysator und Differential Global Positioning System (DGPS, Globales Positionssystem mit Differentialsignal) |
---|---|
Autor: | Larsson, Peter; Henriksson-Larsén, Karin |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 23 (2005), 8, S. 861-870, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640410400022078 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201312008892 |
Quelle: | BISp |
Abstract des Autors
The purpose of this study was to provide a more detailed analysis of performance in cross-country skiing by combining findings from a differential global positioning system (dGPS), metabolic gas measurements, speed in different sections of a ski-course and treadmill threshold data. Ten male skiers participated in a freestyle skiing field test (5.6 km), which was performed with dGPS and metabolic gas measurements. A treadmill running threshold test was also performed and the following parameters were derived: anaerobic threshold, threshold of decompensated metabolic acidosis, respiratory exchange ratio = 1, onset of blood lactate accumulation and peak oxygen uptake ([Vdot]O2peak). The combined dGPS and metabolic gas measurements made detailed analysis of performance possible. The strongest correlations between the treadmill data and final skiing field test time were for [Vdot]O2peak (l · min−1), respiratory exchange ratio = 1 (l · min−1) and onset of blood lactate accumulation (l · min−1) (r = −0.644 to − 0.750). However, all treadmill test data displayed stronger associations with speed in different stretches of the course than with final time, which stresses the value of a detailed analysis of performance in cross-country skiing. Mean oxygen uptake ([Vdot]O2) in a particular stretch in relation to speed in the same stretch displayed its strongest correlation coefficients in most stretches when [Vdot]O2 was presented in units litres per minute, rather than when [Vdot]O2 was normalized to body mass (ml · kg−1 · min−1 and ml · min−1 · kg−2/3). This suggests that heavy cross-country skiers have an advantage over their lighter counterparts. In one steep uphill stretch, however, [Vdot]O2 (ml · min−1 · kg−2/3) displayed the strongest association with speed, suggesting that in steep uphill sections light skiers could have an advantage over heavier skiers. Verf.-Referat