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Load carriage does not reduce absolute mechanical power output but reduces agility in elite military police officers.

Authors :
Hoinatski R
Rodacki C
de Oliveira Weimer RM
Legnani E
Urbinati KS
Cabral AS
Orr R
Paulo AC
Source :
International journal of occupational safety and ergonomics : JOSE [Int J Occup Saf Ergon] 2024 Jul 19, pp. 1-8. Date of Electronic Publication: 2024 Jul 19.
Publication Year :
2024
Publisher :
Ahead of Print

Abstract

Objectives . The main objective of this study was to evaluate mean propulsive velocity (MPV), mean propulsive force (MPF) and mean propulsive power (MPP) in elite police officers under LOADED and UNLOADED conditions. The study also investigated the association of body composition and strength levels under the same load conditions. Methods. Twenty-one men from an elite unit in Brazil participated in the study, performing Smith machine half squats and an agility test. Dual energy X-ray absorptiometry measured body composition; a linear encoder measured MPV, MPF and MPP during the half squats; and a manual chronometer registered agility test performance. Results. The results showed that wearing and carrying occupational loads did not alter the squat exercise's MPP, MPV and MPF but reduced the performance of relative MPP and agility ( p  < 0.05). The results also showed that MPP had a higher association with force (i.e., MPF and one-repetition maximum [1RM]) than velocity (i.e., MPV and agility) under the LOADED condition ( p  < 0.05). Among the body composition variables, only lean body mass was associated with MPP under the LOADED condition ( p  < 0.05). Conclusion. These findings suggest that load carriage does not reduce absolute mechanical power output, but reduces the relative MPP and agility in military police officers.

Details

Language :
English
ISSN :
2376-9130
Database :
MEDLINE
Journal :
International journal of occupational safety and ergonomics : JOSE
Publication Type :
Academic Journal
Accession number :
39028148
Full Text :
https://doi.org/10.1080/10803548.2024.2371733