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Peak outward acceleration and ball release in cricket
Wayne Spratford1, Marc Portus, Andrew Wixted
1a Movement Science , Australian Institute of Sport , Canberra , Australia.
Journal of Sports Sciences
|November 22, 2014
Summary
Peak outward acceleration (POA) from a wrist-worn inertial sensor accurately identifies cricket ball release. This method correlates highly with established biomechanical analysis, offering a valid tool for assessing bowling actions.
Area of Science:
- Sports Biomechanics
- Cricket Performance Analysis
- Wearable Sensor Technology
Background:
- Assessing illegal bowling actions requires precise identification of ball release.
- Traditional biomechanical analysis of ball release is complex and lab-dependent.
- Objective, field-deployable methods for ball release detection are needed.
Purpose of the Study:
- To evaluate the effectiveness of peak outward acceleration (POA) measured by a wrist-worn inertial sensor.
- To determine if POA can serve as a reliable indicator of ball release in cricket bowling.
- To compare POA measurements with a validated motion analysis ball release (MABR) protocol.
Main Methods:
- Twenty-one elite U-19 cricket bowlers participated.
- Bowlers wore an inertial sensor on their wrist during deliveries.
- Ball release was simultaneously captured using the MABR protocol and POA sensor data.
Main Results:
- Peak outward acceleration (POA) showed a high correlation (R² = 0.98) with the MABR protocol.
- Bland-Altman analysis confirmed excellent agreement, with all trials within 0.014 seconds.
- POA demonstrated reliability across different bowler types and delivery styles.
Conclusions:
- Wrist-worn inertial sensors can accurately measure peak outward acceleration (POA).
- POA is a valid and reliable indicator of ball release in cricket bowling.
- Simple regression equations enhance the accuracy of POA for practical application in biomechanical analysis.
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