Reliability of different methods of determining individual interstroke intervals in sprint kayaking

Schofield, Jonathan and Mullineaux, David and Taylor, Danny and Willmott, Sandy (2018) Reliability of different methods of determining individual interstroke intervals in sprint kayaking. In: 36th International Conference on Biomechanics in Sports, 10 - 14 September 2018, Auckland, New Zealand.

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Reliability of different methods of determining individual interstroke intervals in sprint kayaking
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Abstract

The purpose of this study was to explore the reliability of methods for rapidly
determining inter-stroke intervals (ISI) of individual kayakers. One participant performed
two 150 m trials at a rate of 80 single-strokes/min. ISI were calculated using two criterion
measures, visual identification of blade immersion from video record (VID) and peaks in
longitudinal acceleration of the kayak hull derrived from a kayak mounted accelerometer
(ACC). These measures were compared to ISI from peak footrest force (FRP), initiation of
footrest force from a fixed load cell (FRT), paddle Y axis rotational velocity (PAP) and
paddle X axis acceleration via an IMU (PAA). Least products regression analysis (LPR)
revealed that FRP showed the highest reliability, with no fixed or proportional bias
compared to VID or ACC. High ISI during the initial strokes influenced the results of the
LPR. A framework for investigating the reliability of ISI using LPR is suggested where the
initial strokes are removed prior to analysis.

Keywords:coordination, kayak, reliability, timing
Subjects:B Subjects allied to Medicine > B830 Biomechanics, Biomaterials and Prosthetics (non-clinical)
C Biological Sciences > C600 Sports Science
Divisions:College of Social Science > School of Sport and Exercise Science
ID Code:33618
Deposited On:19 Oct 2018 11:40

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