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World Archery Coaching Seminar London, GBR 8 - 11 November 2011.

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Presentation on theme: "World Archery Coaching Seminar London, GBR 8 - 11 November 2011."— Presentation transcript:

1 World Archery Coaching Seminar London, GBR November 2011

2 The Biomechanics of Gold Medal Shooting 9 November 2011 Oliver Logan English Institute of Sport Biomechanist – ArcheryGB EIS Skill Acquisition Lead

3 Note! There are many different styles and techniques of shooting. What is presented here is only our thoughts on what works well World Archery Coaching Seminar

4 Discussion Areas The Biomechanics of Archery Automatic Technique Skill Acquisition 2011 World Archery Coaching Seminar

5 Posture Good posture is extremely important for: Balance String Clearance Effective posterior chain use Shooting mechanics 2011 World Archery Coaching Seminar

6 Posture An ideal posture would see the centre of gravity of the archer centred between the feet 2011 World Archery Coaching Seminar

7 Good PostureForward LeanThoracic/Lumbar Extension

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12 Alignment Proper alignment is important for a robust consistent competition technique Allows the forces of the bow to be controlled via bones and joints rather than through the muscles Creates a more consistent repeatable technique that stands up under pressure 2011 World Archery Coaching Seminar

13 Alignment –Coronal Plane 2011 World Archery Coaching Seminar

14 Alignment 2 types of alignment used in world archery 2011 World Archery Coaching Seminar

15 Alignment 2011 World Archery Coaching Seminar Energy Stored in Limbs Draw Force Direction of Force Line

16 Alignment This way primarily uses posterior deltoid muscle to draw and upper trapezius to anchor 2011 World Archery Coaching Seminar

17 Alignment 2011 World Archery Coaching Seminar Energy Stored in Limbs Draw Force Direction of Force Line

18 Alignment This way uses more of the scapular muscles such as all of the Trapezius muscle, rhomboids as well as posterior deltoid 2011 World Archery Coaching Seminar

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21 Alignment - Sagittal Again very important that the archer stands up straight and does not lean to the side. The archer should be like a crane 2011 World Archery Coaching Seminar

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23 Execution Consistent execution is the result of a good physical setup, draw and alignment Execution is the difference between the best and all the rest Some videos of different execution

24 2011 World Archery Coaching Seminar Execution Errors As the signal from the brain to relax the fingers is sent some of the upper body musculature also relaxes – causing collapse or softness on the shot Can result from: Pain response Not learning the shot properly Poor alignment Lack of strength

25 2011 World Archery Coaching Seminar Tracking Execution Errors Can quantify strength of execution via 2D tracking. 6 marker upper body model Able to provide joint angles, displancements, velocities and accelerations

26 2011 World Archery Coaching Seminar What execution looks like

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28 Automatic Technique In archery when shooting at a target the archer has an external focus on: Aiming Wind conditions Time The archer is not focusing on his/her technique. Therefore if it is not well learnt or automatic then it is more likely to break down

29 2011 World Archery Coaching Seminar

30 Skill Acquisition 1. Learning The Movement -High frequency live feedback (visual/coach) -Archer has low self feedback and awareness 2. Training The Movement -High frequency delayed feedback (visual/coach) -Archer improves awareness and self feedback 3. Practising The Movement -Low Frequency Delayed feedback (visual/coach) -Archer has high movement awareness and self feedback 4. Challenging The Movement -No external feedback -Archer can self correct and movement is autonomous Increase Contextual Interference -Increase Draw Weight, shoot at a target face, increase shooting distance, add pressure etc.

31 2011 World Archery Coaching Seminar References Axford, A. (1995). Archery Anatomy (1st ed.). London UK: Souvenir Press. Ertan, h., Kental, B., Tumer, S.T., and Korkusuz, F. (2003). Activation patterns in forearm muscles during archery shooting. Human Movement Science, 22, Ertan, H. (2009). Muscular activation patterns of the bow arm in recurve archery. Journal of Science and Medicine in Sport, 12, Lin, Jiu-Jenq, Hung, Cheng-Ju, Yang, Ching-Ching, Chen, Hsing-Yu, Chou, Feng-Ching and Lu, Tung-Wu (2010). Activation and tremor of the shoulder muscles to the demands of an archery task. Journal of Sports Sciences, 28: 4, Leroyer, P., Hoecke, V., and Helal, N. (1993). Biomechanical study of the final push-pull in archery. Journal of Sports Sciences, 11, Mann, D. L., and Littke, N. (1989). Shoulder injuries in archery. Canadian Journal of Sports Sciences, Nishizono, H., Shibayama, H., Izuta, T., and Saito, K. (1987). Analysis of archery shooting techniques by means of electromyography. International society of biomechanics in sports. Proceedings. Symposium V (pp ). Athens, Greece. Park. J., and Larven. J. (2007) Archery Australia Shooting Technique: Biomechanics. Schmid, M., Schieppati, M., and Pozzo, T. (2006). Effect of fatigue on the precision of a whole-body pointing task. Neuroscience, 139, Logan, O. (2011). A framework for technical modification: an archery case example. The Sport and Exercise Scientist: the official publication of the British Association of Sport and Exercise Sciences. (29). Masters, R.S.W. and Maxwell, J.P. (2004). 'Implicit motor learning, reinvestment and movement disruption: What you don't know won't hurt you?'. In Williams, A.M. and Hodges, N.J. (eds) Skill Acquisition in Sport: Research, Theory and Practice. Routledge: London Masters, R.S.W. (2008). 'Skill learning the implicit way - say no more!'. In Farrow, D., Baker, J. and MacMahon C. Developing Sport Expertise: Researchers and Coaches Put Theory Into Practice. Routledge: London Porter, J.M and Magill, R.A. (2010). 'Systematically increasing contextual interference is beneficial for learning sports skills'. Journal of Sports Sciences, (28): Schmid, M., Schieppati, M., and Pozzo, T. (2006). Effect of fatigue on the precision of a whole-body pointing task. Neuroscience, 139,

32 Thank you… Ready to answer your questions!


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