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Concurrent Validity and Reliability of Different Technologies for Sprint-Derived Horizontal Force-Velocity-Power
Patrick Cormier1,2,3, Ming-Chang Tsai1, César Meylan1,3,4
1Canadian Sport Institute Pacific, Victoria, British Columbia, Canada.
Journal of Strength and Conditioning Research
|February 2, 2023
Summary
This study found that Catapult and STATSports GPS/GNSS systems offer reliable and moderately to highly accurate sprint-derived horizontal force-velocity-power (FVPH) profiling. Timing gates showed poor agreement, requiring further investigation for FVPH metric calculations.
Area of Science:
- Sports Science
- Biomechanics
- Performance Analysis
Background:
- Accurate assessment of sprint-derived horizontal force-velocity-power (FVPH) metrics is crucial for optimizing athletic performance and guiding rehabilitation.
- Various technologies, including GPS/GNSS and timing gates, are used for FVPH profiling, but their concurrent validity and reliability require thorough evaluation.
Purpose of the Study:
- To concurrently evaluate the validity and reliability of different technologies for assessing sprint-derived horizontal force-velocity-power (FVPH) profile metrics.
- To compare the accuracy of two GPS/GNSS athlete monitoring systems (STATSports Apex, Catapult Vector S7) and a timing gate system against a radar gun for FVPH calculations.
Main Methods:
- Concurrent validity was assessed using intraclass correlation coefficients (ICC), Pearson's correlation coefficients (R²), and Bland-Altman plots.
- Intrasystem reliability was determined through agreement bias and ICC.
- Three systems (STATSports Apex, Catapult Vector S7, timing gates) were compared against a radar gun for FVPH metrics.
Main Results:
- Catapult demonstrated good agreement across all FVPH metrics (F₀, V₀, Pmax, MSS, τ, Drf).
- STATSports showed moderate to good agreement for most FVPH metrics, with slight variations.
- Timing gates exhibited poor agreement for several key FVPH metrics (F₀, Pmax, τ, Drf), indicating significant bias.
Conclusions:
- 10 Hz GPS/GNSS technology is reliable and provides moderate-to-good accuracy for FVPH metrics in maximal effort sprints.
- Catapult systems offer superior agreement for FVPH metrics compared to STATSports, potentially due to algorithmic differences.
- Current methods for modeling timing gate data for FVPH profiling introduce substantial bias and warrant further research.
