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Cross-Country Ski Racing Performance Predicted by Aerobic and Anaerobic Double Poling Power.

Journal of Strength & Conditioning Research: August 2000
Original Article: PDF Only

This study investigated the relationship between double poling aerobic and anaerobic power and cross-country ski race performance. Twenty top U.S. cross-country ski racers completed a treadmill running or classical skiing Vo2max (LB), a long-duration treadmill double-pole Vo2max test (DP, ~850 seconds) and a short-duration double-pole power test (UBP, ~ 200 seconds). LB Vo2max (L[middle dot]min-1) was related to the International Ski Federation System (FIS) rank in points (r =-0.52). Strong significant relationships (p <0.05) were identified between FIS points and DP time to exhaustion (r =-0.80), DP Vo2peak (r =-0.74), and UBP expressed in watts r =-0.68). DP time to exhaustion was related (p <0.05) to UBP (r = 0.48) and DP Vo2peak (r = 0.76) with a multiple R of 0.85. Further analysis indicated that 75% of the variance in FIS points could be accounted for by DP Vo2peak (ml[middle dot]kg-2/3 min-1) and UBP, with DP Vo2peak exhibiting the highest beta. Athlete ranking according to FIS points revealed 2 distinct groups. No differences in LB test results were apparent between these groups; however, the successful group had significantly higher DP and UBP results (p <0.05). These results suggest that UBP is important, but DP Vo2peak is a better predictor of ski performance. This may be explained by the predominantly aerobic nature of cross-country skiing (typical event duration between 25 minutes and 2 hours for men).

(C) 2000 National Strength and Conditioning Association