Advancedracingcomputers.com richard@advancedracingcomputers.com 1 Athlete Response to Using a...

richard@advancedracingcomputers.com

Athlete Response to Using a Real-Time Optical Navigation Feedback

System

Richard Kirby

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

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

Click to view Video

One beep per 0.5 mm slip at most sensitive level

Actual delay between slip and feedback 0.125 seconds

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

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

Skiers must understand what the feedback is telling them

Sensitivity/threshold must be set to the skill level of the skier and snow conditions

Click to view video

Definitely Probably Not Sure ProbablyNot

DefinitelyNot

> 70% 30% to 70% < 30%N = 9

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

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

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)

Thank you for your attention

Hard snow Slope gradual enough to carve cleanly all

gates Mixture of GS and SL gates, stubies and

brushes

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

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

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