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Influence of Reactive and Maximum Strength Indicators on Sprint Performance
Robin Healy1, Carol Smyth, Ian C Kenny
1Department of Physical Education and Sport Sciences, University of Limerick, Limerick, Ireland.
Journal of Strength and Conditioning Research
|June 26, 2018
Summary
This study found that reactive and maximal strength measures did not strongly correlate with sprint performance in sprinters. Further research is needed to develop better tests that reflect the specific demands of sprinting.
Area of Science:
- Sports Science
- Biomechanics
- Athletic Performance
Background:
- Sprint performance is crucial in many sports.
- Understanding the relationship between strength measures and sprint ability is vital for training.
- Existing strength tests may not fully capture the dynamic nature of sprinting.
Purpose of the Study:
- To investigate the correlation between reactive and maximal strength indicators and 40m sprint performance.
- To compare these measures between male and female sprinters.
- To identify potential limitations of current strength assessment methods for predicting sprint ability.
Main Methods:
- 14 male and 14 female sprinters completed 40m sprints with split times recorded.
- Maximal theoretical velocity, force, and peak horizontal power were calculated.
- Isometric midthigh pulls (IMTPs) and drop jumps (DJs) were performed to assess maximal and reactive strength.
- Reactive Strength Index (RSI) was calculated from jump height (JH) and contact time (CT).
Main Results:
- No significant correlations were found between DJ/hopping RSI and sprint performance.
- A strong positive correlation existed between IMTP peak force (PF) and peak horizontal power in men only.
- Male sprinters outperformed females in most strength and power measures, with exceptions in hopping and DJ contact times.
Conclusions:
- Reactive and maximal strength measures, as assessed in this study, show limited association with 40m sprint performance.
- Prolonged contact times in testing and the inability to assess technical force application may explain the weak correlations.
- Developing novel assessment methods that better mimic sprinting's dynamic demands is recommended.
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