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The Impact of External Loads Carried by Police Officers on Vertical Jump Performance.

Authors :
Wiley A
Joseph A
Orr R
Schram B
Kornhauser CL
Holmes RJ
Dawes JJ
Source :
International journal of exercise science [Int J Exerc Sci] 2020 Sep 01; Vol. 13 (6), pp. 1179-1189. Date of Electronic Publication: 2020 Sep 01 (Print Publication: 2020).
Publication Year :
2020

Abstract

The purpose of this study was to examine the impact that external loads have on vertical jump height and peak anaerobic power output (PAPw) of police officers during a vertical jump (VJ) test. Retrospective data of 47 (mean age 38.79 ± 7.97 years) police officers from a US Law Enforcement Agency (LEA) were used for analysis. VJ heights and body mass were used in the Sayers Peak Power Equation to calculate PAPw. Power-to-weight (P:W) ratios were then calculated by dividing PAPw by the officer's body mass. VJ height significantly ( p < .001) decreased with load (unloaded = 49.49 ± 8.46 cm: loaded = 43.62 ± 7.68 cm). A Pearson's correlation showed a significant ( p < .01) low-moderate ( r = .387) relationship between absolute load (9.57 ± .94 kg) and change in PAPw, and a significant ( p < .01) strong ( r = .794) correlation between relative load and changes in P:W. This study supports previous research that suggests that occupational load carriage has a negative impact on VJ performance in police officers and may influence job performance, and that training programs may mitigate these negative effects.

Details

Language :
English
ISSN :
1939-795X
Volume :
13
Issue :
6
Database :
MEDLINE
Journal :
International journal of exercise science
Publication Type :
Academic Journal
Accession number :
33042379