Mechanical parameters as predictors of performance in alpine World Cup slalom racing

Scandinavian Journal of Medicine & Science in Sports
Matej SupejH-C Holmberg

Abstract

The aims of the present study were to develop a method for classifying slalom skiing performance and to examine differences in mechanical parameters. Eighteen elite skiers were recorded with three-dimensional kinematical measurements and thereafter divided into a higher (HP) and lower performance group, using the ratio between the difference in mechanical energy divided by the mass of the skier and section entrance velocity (Δe(mech)/v(in)). Moreover, the skiers' velocity (v), acceleration (a), center of mass turn radii (R(CM)) and skis' turn radii (R(AMS)), ground reaction forces (GRF) and differential specific mechanical energy [diff(e(mech))] were calculated. v and diff(e(mech)) were different between the performance groups (P<0.001 and <0.05), while no inter-group differences in R(CM), R(AMS), a and GRF were observed. A relationship between R(AMS) and diff(e(mech)) was demonstrated (r=0.58; P<0.001). The highest GRFs were related to the lowest diff(e(mech)) and a was related to GRF (r=-0.60; P<0.001). The Δe(mech)/v(in) predicted the performance over short course sections. The HP skiers skied with a higher v and a similar range of diff(e(mech)). We suggest that shortest R(AMS) and the highest GRFs should be reduced in elite...Continue Reading

References

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Feb 6, 2008·Scandinavian Journal of Medicine & Science in Sports·P FederolfE Müller
Jun 27, 2008·Journal of Applied Biomechanics·Matej Supej

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Citations

Nov 6, 2012·Scandinavian Journal of Medicine & Science in Sports·M SupejH-C Holmberg
Mar 23, 2013·Scandinavian Journal of Medicine & Science in Sports·S Bucher SandbakkH-C Holmberg
Apr 26, 2015·Osteoporosis International : a Journal Established As Result of Cooperation Between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA·A-M LiphardtS K Boyd
Sep 18, 2014·International Journal of Sports Physiology and Performance·Matej SupejHans-Christer Holmberg
Dec 5, 2012·Journal of Strength and Conditioning Research·Jay R HydrenCarl M Maresh
Jan 1, 2014·Sports Medicine·Kim Hébert-LosierHans-Christer Holmberg
May 25, 2012·Journal of Sports Sciences·Peter Andreas Federolf
Oct 16, 2018·Journal of Sports Sciences·Matej SupejHans-Christer Holmberg
Mar 1, 2019·Sensors·Benedikt FaselKamiar Aminian
Jun 21, 2019·The Journal of Sports Medicine and Physical Fitness·Michał Staniszewski
Mar 8, 2019·Frontiers in Physiology·Matej Supej, H-C Holmberg
Aug 28, 2020·Frontiers in Physiology·Chenhao YangWeijie Fu
Dec 2, 2020·Scandinavian Journal of Medicine & Science in Sports·Matthew R CrossPierre Samozino
Jan 29, 2021·International Journal of Sports Physiology and Performance·Wolfgang SchobersbergerCornelia Blank
Dec 22, 2020·Frontiers in Sports and Active Living·Clément DelhayeFrédérique Hintzy
Feb 13, 2021·Scientific Reports·Matthias GilgienJörg Spörri
Dec 22, 2020·Frontiers in Sports and Active Living·Björn BruhinMichael Romann

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