Physical and Physiological Factors Associated with Success in Professional Alpine Skiing

Abstract

Scientific data on the physiological profile of world class skiers are sparse. During the last decade the Austria Ski Team was the most successful in the world. It was the objective of this study to describe the physical and physiological characteristics of World Cup (WC) skiers. Twenty female and 28 male members of the Austrian WC Ski Team were examined pre- and post-seasonally from 1997 to 2000. Physical parameters such as age, height, body mass, body mass index, percent body fat and thigh circumference were recorded from each athlete. The physiological variables investigated consisted in the aerobic power and in the muscle strength of the lower limbs. Racing performance was defined by the WC ranking position. The athlete’s aerobic performance capacity was assessed by maximal exercise testing on a bicycle ergometer, and the isokinetic muscle strength of the knee extensor and flexor muscles by the use of a computer-interfaced dynamometer. From 1997 to 2000 about half (48 %; n = 106) of all alpine WC racing events (n = 221) were won by the athletes investigated. The typical world class skier is in the mid-twenties (25.2 y [♀]; 27.6 y [♂]). The mean values for height were 1.66 m (♀) vs. 1.81 m (♂), for body mass 65.1 kg (f) vs. 87 kg (♂) and for the percentage of body fat 24.5 % (♀) vs. 15.8 % (♂). The maximum power output was 4.3 ± 0.4 (♀) and 4.7 ± 0.4 W/kg (♂), the corresponding values for V·O₂max were 55 ± 3.5 (♀) and 60 ± 4.7 ml/kg/min (♂). The maximal values for peak torque and work for knee extension amounted to 206 ± 21 (♀) and 334 ± 43 Nm (♂), and 2690 ± 364 (♀) and 4414 ± 629 J (♂), respectively. In both sexes there were neither significant laterality nor dysbalance. The hamstring/quadriceps ratios were between 0.57 - 0.60. Among all physical and physiological variables, only the aerobic power in males was found to be strongly correlated (r = 0.947; p = 0.001 for W_max; r = 0.964; p < 0.001 for V·O₂max) to racing performance. The study proves the practical experience that success in professional alpine skiing is not related to single physiological variables. Two main factors, however, are crucial, i. e. high levels of aerobic power and muscle strength.

Key words

Alpine skiing - aerobic power - muscle strength - anthropometrical features

References

• 1 Bale P, Colley E, Mayhew J L, Piper F C, Ware J S. Anthropometric and somatotype variables related to strength in American football players.  J Sports Med Phys Fitness. 1994;  34 383-389
• 2 Baron R. Aerobic and anaerobic power characteristics of off-road cyclists.  Med Sci Sports Exerc. 2001;  33 1387-1393
• 3 Coyle E F, Feltner M E, Kautz S A, Hamilton M T, Montain S J, Baylor A M, Abraham L D, Petrek G W. Physiological and biomechanical factors associated with elite endurance cycling performance.  Med Sci Sports Exerc. 1991;  23 93-107
• 4 Farrell P A, Wilmore J H, Coyle E F, Billing J E, Costill D L. Plasma lactate accumulation and distance running performance.  Med Sci Sports. 1979;  11 338-344
• 5 Hagberg J M, Coyle E F. Physiological determinants of endurance performance as studied in competitive racewalkers.  Med Sci Sports Exerc. 1983;  15 287-289
• 6 Helgerud J, Engen L C, Wisloff U, Hoff J. Aerobic endurance training improves soccer performance.  Med Sci Sports Exerc. 2001;  33 1925-1931
• 7 Kornexl E J. Das sportmotorische Eigenschaftsniveau des Alpinen Rennläufers.  Ph. D. Thesis, University of Innsbruck, Austria, 1977
• 8 Mahood N V, Kenefick R W, Kertzer R, Quinn T J. Physiological determinants of cross-country ski racing performance.  Med Sci Sports Exerc. 2001;  33 1379-1384
• 9 Mujika I, Padilla S. Physiological and performance characteristics of male professional road cyclists.  Sports Med. 2001;  31 479-487
• 10 O’Toole M L, Douglas P S, Hiller W D. Applied physiology of a triathlon.  Sports Med. 1989;  8 201-225
• 11 O’Toole M L, Douglas P S. Applied physiology of a triathlon.  Sports Med. 1995;  19 251-267
• 12 Piper F C, Ward C H, McGinnis P M, Milner E K. Prediction of alpine ski performance based upon selected anthropometrical and motor dexterity parameters.  J Sports Med Phys Fitness. 1987;  27 478-482
• 13 Sleivert G G, Rowlands D S. Physical and physiological factors associated with success in the triathlon.  Sports Med. 1996;  22 8-18
• 14 Spring H, Jordan K. Maximal and high-velocity power. A study in Swiss male and female national ski athletes.  Schweiz Z Med Traumatol. 1994;  2 27-29