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

13. Hand Force Variations Human Model

14. Force and Velocity

16. Butterfly Pull

20. MONA Butterfly

21. Backstroke Push

25. MONA Backstroke

26. Breaststroke Outward Scull

28. MONA Breaststroke

29. Freestyle Push

33. MONA Freestyle

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

39. Shoulder Anatomy

40. Shoulder Stress

41. More Shoulder Stress

42. Maximum Shoulder Stress

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

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?