Relative net vertical impulse determines jumping performance
| Autor: | Tracie L Haines, Jeffrey M. McBride, Tyler J. Kirby, Andrea M Dayne |
|---|---|
| Přispěvatelé: | AMS - Tissue Function & Regeneration, ACS - Heart failure & arrhythmias, Physiology |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Male
Acceleration Biophysics Geometry Squat Impulse (physics) Concentric medicine.disease_cause Vertical jump Young Adult Jumping Countermovement Control theory Task Performance and Analysis medicine Humans Orthopedics and Sports Medicine Gait Mathematics Foot Rehabilitation Energy Transfer Peak velocity Jump Stress Mechanical Locomotion |
| Zdroj: | Journal of Applied Biomechanics, 27(3), 207-14. Human Kinetics Publishers Inc. Kirby, T J, McBride, J M, Haines, T L & Dayne, A M 2011, ' Relative net vertical impulse determines jumping performance ', Journal of Applied Biomechanics, vol. 27, no. 3, pp. 207-14 . https://doi.org/10.1123/jab.27.3.207 |
| ISSN: | 1065-8483 |
| Popis: | The purpose of this investigation was to determine the relationship between relative net vertical impulse and jump height in a countermovement jump and static jump performed to varying squat depths. Ten college-aged males with 2 years of jumping experience participated in this investigation (age: 23.3 ± 1.5 years; height: 176.7 ± 4.5 cm; body mass: 84.4 ± 10.1 kg). Subjects performed a series of static jumps and countermovement jumps in a randomized fashion to a depth of 0.15, 0.30, 0.45, 0.60, and 0.75 m and a self-selected depth (static jump depth = 0.38 ± 0.08 m, countermovement jump depth = 0.49 ± 0.06 m). During the concentric phase of each jump, peak force, peak velocity, peak power, jump height, and net vertical impulse were recorded and analyzed. Net vertical impulse was divided by body mass to produce relative net vertical impulse. Increasing squat depth corresponded to a decrease in peak force and an increase in jump height and relative net vertical impulse for both static jump and countermovement jump. Across all depths, relative net vertical impulse was statistically significantly correlated to jump height in the static jump (r = .9337, p < .0001, power = 1.000) and countermovement jump (r = .925, p < .0001, power = 1.000). Across all depths, peak force was negatively correlated to jump height in the static jump (r = –0.3947, p = .0018, power = 0.8831) and countermovement jump (r = –0.4080, p = .0012, power = 0.9050). These results indicate that relative net vertical impulse can be used to assess vertical jump performance, regardless of initial squat depth, and that peak force may not be the best measure to assess vertical jump performance. |
| Databáze: | OpenAIRE |
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