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  • 1.
    Carlsson, Magnus
    et al.
    Högskolan Dalarna, Akademin Utbildning, hälsa och samhälle, Idrotts- och hälsovetenskap.
    Carlsson, Tomas
    Högskolan Dalarna, Akademin Utbildning, hälsa och samhälle, Idrotts- och hälsovetenskap.
    Hammarström, Daniel
    Högskolan Dalarna, Akademin Utbildning, hälsa och samhälle, Idrotts- och hälsovetenskap.
    Tiivel, Toomas
    Malm, Christer
    Tonkonogi, Michail
    Högskolan Dalarna, Akademin Utbildning, hälsa och samhälle, Idrotts- och hälsovetenskap.
    Validation of physiological tests in relation to competitive performances in elite male distance cross-country skiing2012Inngår i: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 26, nr 6, s. 1496-1504Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The purpose of the present study was to establish which physiological test parameters reflects the distance performances in the Swedish National Championships in cross-country skiing (SNC) and the International Ski Federation's ranking points for distance performances (FISdist). The present study also aimed to create multiple regression models to describe skiing performance for the SNC distance races and International Ski Federation's (FIS) ranking. Twelve male, Swedish, national elite, cross-country skiers (maximal oxygen consumption [(V) over dotO(2)max] = 5.34 +/- 0.34 L.min(-1)) volunteered to participate in the study. Their results in the 2008 SNC (15 km race [SNC15] and 30 km race [SNC30]) and FISdist points were used as performance data. On the week preceding the Championship, subjects completed a test battery consisting of 7 physiological tests: isokinetic knee extension peak torque (PT), vertical jumps (VJ), lactate threshold (LT), (V) over dotO(2)max, and 3 double poling tests of different durations (DP20, DP60, and DP360). Correlations were established using Pearson's correlation analysis, and models to describe skiing performance were created using standard multiple linear regression analysis. Significant correlations were found between the performance parameters and test parameters derived from LT, (V) over dotO(2)max, and DP60 tests. No correlations with any performance parameter were found for PT, VJ, DP20, and DP360 tests. For FISdist and SNC15, the models explain 81% and 78% of the variance in performance, respectively. No statistically valid regression model was found for SNC30. The results of this study imply that the physiological demands in male elite distance cross-country skiing performances are different in different events. To adequately evaluate a skier's performance ability in distance cross-country skiing, it is necessary to use test parameters and regression models that reflect the specific performance.

  • 2.
    Carlsson, Magnus
    et al.
    Högskolan Dalarna, Akademin Utbildning, hälsa och samhälle, Idrotts- och hälsovetenskap. Umeå universitet; Dala Sports Academy.
    Carlsson, Tomas
    Högskolan Dalarna, Akademin Utbildning, hälsa och samhälle, Idrotts- och hälsovetenskap. Umeå universitet; Dala Sports Academy.
    Wedholm, Lars
    Högskolan Dalarna, Akademin Utbildning, hälsa och samhälle, Idrotts- och hälsovetenskap. Dala Sports Academy.
    Nilsson, Mattias
    Regional Sports Federation of Dalarna.
    Malm, Christer
    Idrottsmedicin, Umeå Universitet.
    Tonkonogi, Michail
    Högskolan Dalarna, Akademin Utbildning, hälsa och samhälle, Medicinsk vetenskap.
    Physiological demands of competitive sprint and distance performance in elite female cross-country skiing2016Inngår i: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 30, nr 8, s. 2138-2144Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The purpose was to investigate the relationship between elite females' competitive performance capability in sprint and distance cross-country skiing and the variables of gross efficiency (GE), work rate at the onset of blood-lactate accumulation (OBLA4mmol), maximal oxygen uptake (VO2max), maximal speed (Vmax), and peak upper-body oxygen uptake (VO2peak). Ten elite female cross-country skiers (age 24.5 ± 2.8 years) completed treadmill roller-skiing tests to determine GE, OBLA4mmol, and VO2max using the diagonal-stride technique as well as Vmax and VO2peak using the double-poling technique. International Ski Federations ranking points for sprint (FISsprint) and distance (FISdist) races were used as competitive performance data. There were correlations between the FISsprint and the VO2max expressed absolutely (P = 0.0040), Vmax (P = 0.012), and VO2peak expressed absolutely (P < 0.001) and as a simple ratio-standard (P = 0.049). The FISdist were correlated with OBLA4mmol (P = 0.048), VO2max expressed absolutely (L·min) (P = 0.015) and as a simple ratio-standard (P = 0.046), and VO2peak expressed absolutely (P = 0.036) and as a simple ratio-standard (mL·min·kg) (P = 0.040). The results demonstrate that the physiological abilities reflected by VO2max and VO2peak are indicators of competitive sprint and distance performance in elite female cross-country skiing. In addition, the ability to generate a high Vmax indicates the performance in sprint races whereas the skier's OBLA4mmol reflects the performance capability in distance races. Based on the results, when evaluating the performance capacity of elite female cross-country skiers, it is recommended to use physiological variables that reflect competitive performance.

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