Presentation on theme: "Kinetic Analyses of Two Fencing Attacks–Lunge and Fleche"— Presentation transcript:
1 Kinetic Analyses of Two Fencing Attacks–Lunge and Fleche Nathan Morris,Mark Farnsworth,and D.G.E. RobertsonSchool of Human Kinetics, University of Ottawa, Ottawa, Canada
2 Introduction Fencing is an Olympic sport There are three weapons 20,000 registered fencers in the U.S.Highly dynamic sport
3 Literature Review Roi, G., & Bianchedi, D. (2008) Asymmetrical movementsAsymmetrical force productionMost injuries to muscles, tendons, and ligaments of the lower limbsKerwin, D.G., & Challis, J.H.Measured joint angles and impact forcesFew studies using motion capture analysis, inverse dynamics, or kinetic analysis
4 Methodology 7 Vicon infrared MX13 cameras 3 force platforms Vicon WorkstationVisual3DAverage of three trialsSubject:MaleAged: 21Internationally competitive athlete
5 Results - Lunge Flexion/ Extension Adduction/Abduction Trail leg plantiflexorsTrail hip abductorsStabilization during stance phaseTrail knee extensors
6 Results - Lunge Large power output from trail ankle and knee joints Large moment for hip abductors particularly for trail legNegligible hip extensionPower for attack comes solely from the trail limb
7 Results - Fleche Flexion/ Extension Adduction/Abduction Lead knee extensors extend and stabilizeTrail leg plantiflexorsLead leg plantiflexorsLead hip extensorsTrail hip extensorsTrail hip abductorsTrail knee extensorsTrail hip flexors stabilize & resist extensionLeft hip flexors
8 Results - Fleche Extension from both ankles Abduction of the trail leg Flexion and extension of the hip jointBoth left and right lower limbs contribute to movement
9 Discussion - LungePower generating muscles contract nearly simultaneouslyRelies primarily on the extensors of the ankle and kneePre-stretching of ankle and knee muscles was absentHip abductors are generally weak musclesLess power but more stabilityPrimary method of attackLow level of coordinationOne thing to note is that there is no pre-stretch phase to this movement apart from the stabilization of the left hip during the kick off of the first leg. This is mainly due to the need for subtlety of the attack.
10 Discussion - Fleche 3 1 3 1 2 Orderly recruitment Utilizes ankle, knee, and hip extensors, hip flexors, and hip abductorsVery fast and powerful movementLittle controlHigher level of coordination
11 Discussion - Lunge vs Fleche Main difference comes from the fleche’s use of hip extensorsFleche: more power = more tiring
12 ConclusionsPlantiflexors, knee extensors, hip flexors, extensors, and abductors play important roles in power generationVery asymmetrical movementsMore emphasis on leg abduction than most human movements
13 ReferencesKerwin, D.G., & Challis, J.H. (1987). Fencing Lunge. International Journal of Sport Biomechanics, 3(2), 167. Retrieved from SPORTDiscus with Full Text database.Roi, G., & Bianchedi, D. (2008). The Science of Fencing. Sports Medicine, 38(6), Retrieved from SPORTDiscus with Full Text database.