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2. The Elevated Track in Pole Vault: An Advantage During Run-Up?

Author

Cross, Matt, Lahti, Johan, Brown, Scott, Chedati, Mehdi, Jimenez-Reyes, Pedro, Samozino, Pierre, Eriksrud, Ola, MORIN, Jean-Benoît, Sandbakk, Øyvind, Girard, Olivier, Brocherie, Franck, Cassirame, Johan, Sanchez, Hervé, Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM ), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet [Saint-Étienne] (UJM), Centre de résonance magnétique biologique et médicale (CRMBM), Assistance Publique - Hôpitaux de Marseille (APHM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), French Institute of Sport (INSEP), Research Department, Laboratory Sport, Expertise and Performance (EA7370) (SEP (EA7370)), Institut national du sport, de l'expertise et de la performance (INSEP), Institute of Sport Sciences of University of Lausanne (ISSUL), Laboratoire Culture, sport, santé, société - UFC (EA 4660) (C3S), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Centre de Recherches du Service de Santé des Armées (CRSSA), Service de Santé des Armées, Université de Lausanne (UNIL), and Laboratoire Culture, sport, santé, société - UFC (UR 4660) (C3S)

Subjects
[SDV]Life Sciences [q-bio], Acceleration, Football, Physical Therapy, Sports Therapy and Rehabilitation, Acceleration (differential geometry), Athletic Performance, Kinetic energy, Running, 03 medical and health sciences, stride rate, 0302 clinical medicine, Nuclear magnetic resonance, Horizontal force, Humans, Orthopedics and Sports Medicine, Treadmill, Physics, Leg, biology, Athletes, speed, 030229 sport sciences, biology.organism_classification, Kinetics, Cross-Sectional Studies, Sprint, Vertical force, Exercise Test, MAX phases, 030217 neurology & neurosurgery, performance
Abstract

The purpose of this study was to present a potential link between sprint kinetic (vertical [F V] and horizontal force [F H]) asymmetries and athletic performance during acceleration and maximal velocity (v max) sprinting. Thirty un-injured male rugby athletes performed 8-s sprints on a non-motorised treadmill. Kinetic data were divided into ‘strong’ and ‘weak’ legs based on individually averaged peak values observed during sprinting and were analysed to evaluate asymmetry. Large differences were found between the strong and weak legs in F H during acceleration (4.3 vs. 3.5 N·kg−1) and v max (3.7 vs. 2.8 N·kg−1) sprinting (both ES=1.2), but not in F V (21.8 vs. 20.8 N·kg−1, ES=− 0.6 for acceleration; 23.9 vs. 22.8 N·kg−1, ES=− 0.5 for v max, respectively). Group mean asymmetry was lower in F V compared to F H during acceleration (1.6 vs. 6.8%) and v max (1.6 vs. 8.2%). The range of asymmetry was much lower in F V (0.03–4.3%) compared to F H (0.2–28%). In un-injured rugby athletes, the magnitude and range of asymmetry scores in F H, occurring during acceleration and v max phases, where much greater than those found in F V. These findings highlight the potential for some un-injured athletes to possess kinetic asymmetries known as crucial components for acceleration performance in sprinting.

Published
2017

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