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ICSS 2007 - PowerPoint PPT Presentation

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ICSS 2007

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  1. ICSS 2007 Athlete Response to Using a Real-Time Optical Navigation Feedback System Richard Kirby richard@advancedracingcomputers.com 1

  2. Introduction richard@advancedracingcomputers.com Today, athletes in many sports benefit from real-time quantitative feedback about their performance during training and racing Feedback is critical as it is the brain’s link to the body. (Shea et al., 1993) Quantitative feedback in alpine skiing generally comes well after the performance Technique improvement often comes through video analysis that is qualitative and comes hours after the training 2

  3. Aim of this study richard@advancedracingcomputers.com Verify if alpine ski racers perceive a benefit from using real time audio feedback related to lateral displacement to improve their carving technique Evaluate the “distraction” effect of audio feedback while training Evaluate if the skiers detect a change in the characteristics of their skis due to the apparatus 3

  4. Apparatus Click to view Video richard@advancedracingcomputers.com 4

  5. Technology Y X richard@advancedracingcomputers.com 5

  6. Feedback richard@advancedracingcomputers.com One beep per 0.5 mm slip at most sensitive level Actual delay between slip and feedback 0.125 seconds 6

  7. richard@advancedracingcomputers.com Randomly selected young racers training at Mount Hood as part of summer race camps Familiarized the racers with the meaning of the feedback Racers trained 2 hours with device in gates Racers filled out survey Racers were interviewed for subjective comments 7

  8. Subjects richard@advancedracingcomputers.com 12 club level racers (5 years to 15 years racing) 13 – 18 years old except one 43 year old master Average age 18.9 years old 5 girls, 7 boys 11 out of 12 had never used real time feedback prior to test 8

  9. Familiarization richard@advancedracingcomputers.com Skiers must understand what the feedback is telling them Sensitivity/threshold must be set to the skill level of the skier and snow conditions 9

  10. Garland Click to view video richard@advancedracingcomputers.com 10

  11. Drifted initiation Click to view video richard@advancedracingcomputers.com 11

  12. Single carved arc Click to view video richard@advancedracingcomputers.com 12

  13. Linked carved turns Click to view video richard@advancedracingcomputers.com 13

  14. Survey Results

  15. Did having the device attached to your skis affect your skiing? richard@advancedracingcomputers.com 15

  16. Did the real time feedback help you better understand your carving skills? richard@advancedracingcomputers.com 16

  17. Did the real time feedback help you improve your carving skills? richard@advancedracingcomputers.com 17

  18. How often would you like to use real time feedback in training? N = 9 richard@advancedracingcomputers.com 18

  19. How satisfied were you using real time feedback for training? richard@advancedracingcomputers.com 19

  20. It is like watching a video of yourself while you are skiing I’ve been racing for 10 years and I didn’t know I slipped that badly at the initiation of my turn It really helped me understand the issues I have with the timing of my turns The audio feedback was distracting at first It tells me I’m doing something wrong, but not what to do to correct it Comments from Interview richard@advancedracingcomputers.com 20

  21. Discussion richard@advancedracingcomputers.com • While we did not evaluate if performance actually improved, we interviewed several of the coaches who believed that they saw improvements in their skiers after the two hour test • Some skiers adapted to the feedback much quicker than others • Those that were more technologically savvy • Those that play computer games • Importance of familiarization process 21

  22. Next steps richard@advancedracingcomputers.com Evaluate performance improvement Evaluate different types of feedback and different familiarization exercises Evaluate the effect of a coaching program based around using real-time feedback (coaches device) 22

  23. Thank you for your attention

  24. Conditions richard@advancedracingcomputers.com Hard snow Slope gradual enough to carve cleanly all gates Mixture of GS and SL gates, stubies and brushes 24

  25. Survey Results richard@advancedracingcomputers.com • Did real time feedback help you better understand your carving skills. • 83% definitely • 17% probably • Did real time feedback help you improve your carving skills • 50% definitely • 33% probably • 17% not sure 25

  26. Survey Results (continued) richard@advancedracingcomputers.com • How often would you like to use real time feedback in training? • 11% > 70% of the time • 78% 30% to 70% of the time • 11% < 30% • 3 no-answer • Satisfaction with real time feedback as training tool in gates • 58% Very satisfied • 33% Somewhat satisfied • 8 % Neither satisfied nor dissatisfied 26