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The Reliability of Using a Laser Device to Assess Deceleration Ability.
1Department of Sport, Health and Exercise Sciences, University of Hull, Hull HU6 7RX, UK.
Sports (Basel, Switzerland)
|August 14, 2019
Summary
This study found that a laser Doppler device offers moderate to excellent reliability in measuring deceleration ability in rugby players. This method shows promise for objectively quantifying this key component of athletic performance.
Area of Science:
- Sports Science
- Biomechanics
- Athletic Performance Analysis
Background:
- Deceleration ability is crucial for change of direction speed in athletes.
- Objective measurement methods for deceleration are scarce in existing literature.
- Quantifying deceleration is essential for training and performance evaluation.
Purpose of the Study:
- To assess the reliability of a laser Doppler device (LAVEG) for quantifying deceleration ability.
- To investigate both within- and between-session reliability metrics (ICC, CV, SEM, SDD).
- To evaluate the device's utility in amateur rugby union players.
Main Methods:
- Twenty amateur rugby union players participated in the study.
- Participants completed familiarization and two experimental sessions separated by seven days.
- Maximal 15m sprints followed by immediate deceleration to a stop were measured using a laser Doppler device.
- Deceleration was analyzed based on the distance to reach specific velocity percentages (75%, 50%, 25%, 0%).
Main Results:
- Within-session reliability was moderate to good (ICC: 0.64-0.83) with borderline acceptable variation (CV: 10.51%-16.71%).
- Between-session reliability demonstrated good to excellent relative reliability (ICC: 0.79-0.93).
- Acceptable absolute reliability was observed for stopping distance (SEM: 6.54%; SDD: 9.11%).
Conclusions:
- The laser Doppler device exhibits promising reliability for quantifying athlete deceleration ability.
- This objective method can be a valuable tool for sports science and coaching.
- Further research can explore its application across different sports and athlete populations.
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