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Validity and reliability of critical power field testing.
B Karsten1, S A Jobson, J Hopker
1Department of Life and Sport Science, University of Greenwich, Kent, ME4 4TB, UK, kb20@gre.ac.uk.
European Journal of Applied Physiology
|September 28, 2014
Summary
Field testing provides valid and reliable critical power (CP) values. This study confirms that different field-testing protocols accurately measure CP, making it a dependable metric for athletes.
Area of Science:
- Exercise Physiology
- Sports Science
- Performance Measurement
Background:
- Critical Power (CP) is a key physiological metric for endurance athletes.
- Accurate CP measurement is crucial for effective training prescription.
- Field-based testing offers a practical alternative to laboratory assessments.
Purpose of the Study:
- To evaluate the validity and reliability of critical power (CP) determined through various field-testing protocols.
- To compare field-derived CP values with laboratory-based measurements.
- To establish the practical utility of field CP testing in sports science.
Main Methods:
- Three distinct field-testing protocols involving maximal efforts of 3, 7, and 12 minutes were employed.
- Cyclists performed repeated maximal efforts with standardized recovery periods.
- Training and racing data were analyzed to extract relevant power outputs for CP calculation.
Main Results:
- Field CP testing demonstrated good validity and reliability across different protocols.
- Standard errors of the estimate for CP ranged from 4.5% to 5.8%.
- Intraclass correlation coefficients for repeated trials were consistently high (0.96–0.99).
Conclusions:
- Field-based critical power (CP) testing protocols are valid and reliable.
- These findings support the use of field tests for assessing CP in athletes.
- Practical application of field CP testing can enhance training personalization.
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