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Accuracy of Jump-Mat Systems for Measuring Jump Height

Artykuł
Czasopismo : International Journal of Sports Physiology and Performance   Tom: 12, Zeszyt: 7, Strony: 959-963
Basilio Pueo [1] , Patrycja Lipińska [2] , José M. Jiménez-Olmedo [1] , Piotr Żmijewski [2] , Will G. Hopkins [3]
2017 angielski
Liczba arkuszy: 0,9
Link do publicznie dostępnego pełnego tekstu
Identyfikatory
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Cechy publikacji
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  • Oryginalny artykuł naukowy
  • Zrecenzowana naukowo
Dyscypliny naukowe
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Nauki o kulturze fizycznej , Nauki o zdrowiu
Słowa kluczowe
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Abstrakty ( angielski )
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Purpose: Vertical-jump tests are commonly used to evaluate lower-limb power of athletes and non-athletes. Several types of equipment are available for this purpose. Here we compared the error of measurement of two jump-mat systems (Chronojump-Boscosystem and Globus Ergo Tester) with that of a motion-capture system as a criterion. Additionally we determined the modifying effect of foot length on jump height. Methods: Thirty-one young adult males alternated four countermovement jumps with four squat jumps. Mean jump height and standard deviations representing technical error of measurement arising from each device and variability arising from the subjects themselves were estimated with a novel mixed model and evaluated via standardization and magnitude-based inference. Results: The jump-mat systems produced nearly identical measures of jump height (differences in means and in technical errors of measurement ≤1 mm). Countermovement and squat-jump height were both 13.6 cm higher with motion capture (90% confidence limits ±0.3 cm), but this very large difference was reduced to small unclear differences when adjusted to a foot length of zero. Variability in countermovement and squat-jump height arising from the subjects was small (1.1 and 1.5 cm respectively, 90% confidence limits ±0.3 cm); technical error of motion capture was similar in magnitude (1.7 and 1.6 cm, ±0.3 and ±0.4 cm), while that of the jump mats was similar or smaller (1.2 and 0.3 cm, ±0.5 and ±0.9 cm). Conclusions: The jump-mat systems provide trustworthy measurements for monitoring changes in jump height. Foot length can explain the substantially higher jump height observed with motion capture.
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