title: Scaling maximal oxygen uptake to predict performance in elite-standard men cross-country skiers.
abstract: The purpose of this study was to: 1) establish the optimal body-mass exponent for maximal oxygen uptake (VO(2)max) to indicate performance in elite-standard men cross-country skiers; and 2) evaluate the influence of course inclination on the body-mass exponent. Twelve elite-standard men skiers completed an incremental treadmill roller-skiing test to determine VO(2)max and performance data came from the 2008 Swedish National Championship 15-km classic-technique race. Log-transformation of power-function models was used to predict skiing speeds. The optimal models were found to be: Race speed = 7.86 · VO(2)max · m(-0.48) and Section speed = 5.96 · [VO(2)max · m(-(0.38 + 0.03 · α)) · e(-0.003 · Δ) (where m is body mass, α is the section's inclination and Δ is the altitude difference of the previous section), that explained 68% and 84% of the variance in skiing speed, respectively. A body-mass exponent of 0.48 (95% confidence interval: 0.19 to 0.77) best described VO(2)max as an indicator of performance in elite-standard men skiers. The confidence interval did not support the use of either "1" (simple ratio-standard scaled) or "0" (absolute expression) as body-mass exponents for expressing VO(2)max as an indicator of performance. Moreover, results suggest that course inclination increases the body-mass exponent for VO(2)max.
authors.affiliation: a Dalarna University , Falun , Sweden.
authors.forename: Tomas
authors.initials: T
authors.lastname: Carlsson
authors.forename: Magnus
authors.initials: M
authors.lastname: Carlsson
authors.forename: Majbritt
authors.initials: M
authors.lastname: Felleki
authors.forename: Daniel
authors.initials: D
authors.lastname: Hammarström
authors.forename: Daniel
authors.initials: D
authors.lastname: Heil
authors.forename: Christer
authors.initials: C
authors.lastname: Malm
authors.forename: Michail
authors.initials: M
authors.lastname: Tonkonogi
mesh_terms: D000328:Adult; D054874:Athletic Performance; D001835:Body Weight; D005080:Exercise Test; D006801:Humans; D008297:Male; D010100:Oxygen / Q000378:metabolism*; D010101:Oxygen Consumption; D010807:Physical Endurance / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D012865:Skiing / Q000502:physiology; D013177:Sports / Q000502:physiology*; D013548:Sweden; D055815:Young Adult
chemical_list: D010100:Oxygen