Carry-Over of Force Production Symmetry in Athletes of Differing Strength Levels
| Autor: | Kimitake Sato, Angus Burnett, Michael H. Stone, Christopher A. Bailey |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Male
Adolescent Population Physical Therapy Sports Therapy and Rehabilitation Isometric exercise Young Adult Isometric Contraction Statistics Humans Orthopedics and Sports Medicine Force platform Muscle Strength Ground reaction force education Mathematics education.field_of_study biology Athletes General Medicine biology.organism_classification Symmetry (physics) Weight distribution Exercise Test Jump Female |
| Zdroj: | Journal of Strength and Conditioning Research. 29:3188-3196 |
| ISSN: | 1064-8011 |
| Popis: | This study sought to determine the level of association between bilateral force production symmetry assessment methods (standing weight distribution [WtD], unloaded and lightly loaded jumps, and isometric strength) and to determine whether the amount of symmetry carry-over between these tasks differs for strong and weak athletes. Subjects for this study included male (n = 31) and female (n = 32) athletes from National Collegiate Athletic Association Division I sports. Athletes performed WtD, unloaded and lightly loaded (20 kg) static and countermovement jumps, and isometric midthigh pull (IMTP) assessments on 2 adjacent force plates. Ground reaction force data were used to calculate symmetry variables and performance-related variables. Using Pearson zero order correlations, evaluations of the amount of symmetry carry-over were made. Weight distribution correlated strongly with jump peak force (PF) (r = 0.628-0.664). Strong relationships were also observed between loading conditions for jump variables (r = 0.568-0.957) as were the relationships between jump types for PF, peak power, and net impulse (r = 0.506-0.834). Based on the pooled sample, there was a lack of association between IMTP and WtD for jump symmetry variables. However, when examining strong and weak groups, rate of force development showed moderate to strong symmetry carry-over in the strongest athletes (r = 0.416-0.589). Stronger athletes appear to display similar explosive strength symmetry characteristics in dynamic and isometric assessments, unlike weaker athletes. Strength seems to influence the amount of force production symmetry carry-over between bilateral assessments. There may be optimal loads and variables for symmetry assessment, but these may differ based on population characteristics. |
| Databáze: | OpenAIRE |
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