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Eccentric Force Velocity Profiling: Motor Control Strategy Considerations and Relationships to Strength and Jump
Leland Barker1, Jacob Siedlik1, Mitchel Magrini1
1Department of Exercise Science and Pre-Health Professions, Creighton University, Omaha, Nebraska; and.
Journal of Strength and Conditioning Research
|July 19, 2022
Summary
This study characterized the eccentric force-velocity profile (eFVP) during drop landings. No significant relationships were found between the eFVP and common strength or jump metrics in recreationally trained athletes.
Area of Science:
- Biomechanics
- Motor Control
- Sports Science
Background:
- The eccentric force-velocity profile (eFVP) is crucial for understanding an athlete's braking capacity during landings.
- Limited research exists on eFVP during drop landings from varying heights.
Purpose of the Study:
- To assess the eFVP during bilateral drop landings from increasing drop heights.
- To explore relationships between eFVP and strength/jumping performance metrics.
Main Methods:
- 19 athletes performed 1-repetition maximum back squats, various jumps, and drop landings from incremental box heights (0.3-1.52m).
- Eccentric force and velocity data from peak landing trials were used to generate eFVP.
- Second-order polynomial and linear models were fitted to the eFVP data.
Main Results:
- The mean second-order polynomial eFVP was -1.37x^2 - 25.84x + 0.17, fitting the data better than a linear model (p < 0.05).
- No significant correlations were observed between eFVP coefficients and measures of relative strength or jumping performance.
Conclusions:
- Eccentric force production during landing may be a distinct physiological quality.
- Specific training strategies, such as fast or slow eccentric training, may be needed to develop eccentric force production during landings.
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