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Hand Force Analysis to Optimize Swimming Technique Rod Havriluk, Ph.D. Swimming Technology Research.

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Presentation on theme: "Hand Force Analysis to Optimize Swimming Technique Rod Havriluk, Ph.D. Swimming Technology Research."— Presentation transcript:

1 Hand Force Analysis to Optimize Swimming Technique Rod Havriluk, Ph.D. Swimming Technology Research

2  Hand Force Analysis Method  Examples & Model Development  Learning Strategies Force Variations Model

3  Model is Based on Science  Faster Skill Development  Avoid Injury Benefits for Coach

4  Hand Force Analysis  Previous Research  Principles of Physics Source for Information

5 Aquanex Test Preparation

6 Underwater Camera

7 Test Procedure

8 Immediate Feedback

9 Breaststroke Pull

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13 Hand Force Variations Human Model

14 Force and Velocity

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16 Butterfly Pull

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20 MONA Butterfly

21 Backstroke Push

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25 MONA Backstroke

26 Breaststroke Outward Scull

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28 MONA Breaststroke

29 Freestyle Push

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33 MONA Freestyle

34 Modél Optimál Natación Biomechanical Model  Minimum Resistance  Maximum Propulsion  Maximum Stroke Length  Maximum Stroke Rate  Minimum Shoulder Stress MONA

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39 Shoulder Anatomy

40 Shoulder Stress

41 More Shoulder Stress

42 Maximum Shoulder Stress

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45 Minimal Force

46 Force Increase

47 Time0 sec.35 sec.82 sec Event Hand Force Generation Begins Hands Submerge Below Shoulders Hand Force Generation Ends Proportion of Stroke Cycle 0%43%100% Wasted 43% of Stroke Cycle Becker & Havriluk, 2010

48 Effective Arm Entry

49 Ineffective Arm Entry

50 Time of Exposure

51 Effective Arm Entry

52  Physiology - Quality vs Quantity  Anatomy - Injury potential  Skill-learning - Reinforce limitations Progress Issues

53  Traditional  Deliberate Type of Practice

54 Streamline

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56 Streamline Cues 1.One hand on top of the other 2.Elbows locked 3.Upper arms squeezing ears 4.Vision directed at bottom of pool directly beneath head 5.Legs straight 6.Toes pointed 7.Feet together

57 Deliberate Practice Effect Jefferies, et al 2012

58 Practice Effect

59 Deliberate Practice  Clear instructions  Appropriate task difficulty  Sufficient number of repetitions  Immediate feedback  Individualized supervision  Variety of learning strategies  Stay in cognitive and associative stages  Replicate superior performance

60  Hand Force Analysis Method  Examples & Model Development  Learning Strategies Summary

61 swimmingtechnology.com Thank you. Questions?


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