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Kinetic Analyses of Two Fencing Attacks–Lunge and Fleche

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1 Kinetic Analyses of Two Fencing Attacks–Lunge and Fleche
Nathan Morris, Mark Farnsworth, and D.G.E. Robertson School 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 movements Asymmetrical force production Most injuries to muscles, tendons, and ligaments of the lower limbs Kerwin, D.G., & Challis, J.H. Measured joint angles and impact forces Few studies using motion capture analysis, inverse dynamics, or kinetic analysis

4 Methodology 7 Vicon infrared MX13 cameras 3 force platforms
Vicon Workstation Visual3D Average of three trials Subject: Male Aged: 21 Internationally competitive athlete

5 Results - Lunge Flexion/ Extension Adduction/Abduction
Trail leg plantiflexors Trail hip abductors Stabilization during stance phase Trail knee extensors

6 Results - Lunge Large power output from trail ankle and knee joints
Large moment for hip abductors particularly for trail leg Negligible hip extension Power for attack comes solely from the trail limb

7 Results - Fleche Flexion/ Extension Adduction/Abduction
Lead knee extensors extend and stabilize Trail leg plantiflexors Lead leg plantiflexors Lead hip extensors Trail hip extensors Trail hip abductors Trail knee extensors Trail hip flexors stabilize & resist extension Left hip flexors

8 Results - Fleche Extension from both ankles Abduction of the trail leg
Flexion and extension of the hip joint Both left and right lower limbs contribute to movement

9 Discussion - Lunge Power generating muscles contract nearly simultaneously Relies primarily on the extensors of the ankle and knee Pre-stretching of ankle and knee muscles was absent Hip abductors are generally weak muscles Less power but more stability Primary method of attack Low level of coordination One 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 abductors Very fast and powerful movement Little control Higher level of coordination

11 Discussion - Lunge vs Fleche
Main difference comes from the fleche’s use of hip extensors Fleche: more power = more tiring

12 Conclusions Plantiflexors, knee extensors, hip flexors, extensors, and abductors play important roles in power generation Very asymmetrical movements More emphasis on leg abduction than most human movements

13 References Kerwin, 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.

14 Thank you! Questions?

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