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Supplementary Assistance for Rowing Coaching. “Examining the effect of real-time visual feedback on the quality of rowing technique”. Simon Fothergill Ph.D. student, Computer Laboratory, University of Cambridge.

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Examining the effect of real time visual feedback on the quality of rowing technique l.jpg

Supplementary Assistance for Rowing Coaching

“Examining the effect of real-time visual feedback on the quality of rowing technique”

Simon Fothergill

Ph.D. student, Computer Laboratory, University of Cambridge

8th Conference of the International Sports Engineering Association, Vienna, July 2010


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Technology helps rowers maintain good technique

  • A system can give real-time, visual feedback of raw kinetic data for an indoor rower’s technique.

  • The system is deployed in a real training environment and used by coaches and rowers.

  • The system is a suitable training tool for helping to maintain consistently good technique.


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Feedback must be evaluated

  • Feedback is a fundamental pedagogical mechanism

    • Self-perception

    • Busy coaches

    • Complexity and “data-bloat”

  • Evaluation is scarce


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Kinetics Captured Cheaply


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Novel sensors allow coaches to characterise data


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Deployment driven design of feedback


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Does performance depend on training task, physiological condition or feedback?

Evaluation Methodology

  • Coach athlete until made progress

  • Record target performance

  • Row with different feedback:

    • none

    • real-time kinetics

    • target performance

  • under various conditions:

    • After 30 minutes, comfortable rate

    • After 5 weeks, comfortable rate

    • After 5 weeks, race pace

    • After 5 weeks, fatigued, comfortable rate

  • Participants

    • 5 amateur rowers

    • 2 professional GB rowing coaches


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    How technically good is a performance?

    Performance metrics

    • Energy supplied to ergometer

    • Approximate consistency

    • Approximate similarity to target

    • Approximate efficiency


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    Results

    Example: The force performance metrics increases with feedback and decreases without during a session from Expt. 1 for rower 3.

    The mean and standard deviation for the metrics over all the strokes of a session are given.

    Values are rounded to 3 significant figures. Some data was lost due to a sensor system fault.


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    Feedback is useful whilst fatigued

    • Little / detrimental effect on performance immediately after rowing (1 case where feedback helps).

    • Quite strong correlation after prolonged solo training and during race-pace piece.

    • Significant correlation during fatigued rowing.


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    Logistics limits evaluation

    • Better algorithms to measure the similarity between performances have been discovered based on Discrete Time Warping.

    • Evaluation dataset is currently small.

    • Order of experiments is not varied.

    • Sessions are only 1 minute long.

    • Separate investigation of the forms of feedback used within the system.

    • Evaluation of further forms of feedback such as haptic displays.

    • Correlation of performance metrics.


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    Technology helps rowers maintain good technique

    The system is of some use in helping rowers to maintain a consistently good technique as described by a coach, especially when the athletes suffer from extended absence of their own coach or become fatigued.


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    Acknowledgements

    Professor Andy Hopper

    Computer Laboratory, Cambridge

    SeSAME (EPSRC project)

    Jesus College Cambridge Boat Club

    Cambridge Cantabs. Boat Club

    GB Rowing


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    Thank you for your attention.

    Comments and questions, please!


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