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Reliability and Validity of Key Performance Metrics of Modified 505 Test
Aleksandar Živković1, Srdjan Marković1, Ivan Cuk2
1Faculty of Physical Education and Sports Management, Singidunum University, 11000 Belgrade, Serbia.
Life (Basel, Switzerland)
|February 26, 2025
Summary
This study validates a modified 505 Change of Direction (CoD) test for athletic performance, showing reliable sprint and CoD times. The modified test offers a more precise and efficient assessment for athletes.
Area of Science:
- Sports Science
- Biomechanics
- Exercise Physiology
Background:
- Assessing athletic performance requires reliable and valid metrics.
- Traditional Change of Direction (CoD) tests may have limitations in reflecting real-world agility.
- Optimizing performance evaluation protocols is crucial for athlete development.
Purpose of the Study:
- To determine the reliability and validity of a modified 505 CoD test.
- To evaluate key performance metrics including sprint time, CoD time, total time, and Limb Symmetry Index (LSI).
- To assess the impact of incorporating reaction time on test validity and reliability.
Main Methods:
- Twenty-seven physically active males performed standard and modified sprint and CoD protocols.
- Key metrics measured: sprint time, CoD time, total time, and LSI.
- Statistical analysis included Intraclass Correlation Coefficient (ICC) and Coefficient of Variation (CV) for reliability, and correlation coefficients (r) for validity.
Main Results:
- Modified protocols showed good reliability (ICC > 0.8) and high validity (r = 0.58-0.80) for sprint and CoD times.
- Total time metric demonstrated excellent reliability (ICC > 0.9).
- Inclusion of reaction time improved ecological validity but increased variability (CV > 7%); LSI showed lower reliability (ICC < 0.6).
Conclusions:
- The modified 505 CoD test is a reliable and valid tool for assessing athletic performance metrics.
- Streamlined assessments with multidimensional agility metrics enhance precision and reduce fatigue.
- Further research is needed to refine LSI measures and explore broader applications in diverse athletic populations.
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