TY  - JOUR
PY  - 2015//
TI  - Changes in combat task performance under increasing loads in active duty marines
JO  - Military medicine
A1  - Jaworski, Rebecca L.
A1  - Jensen, Andrew
A1  - Niederberger, Brenda
A1  - Congalton, Robert
A1  - Kelly, Karen R.
SP  - 179
EP  - 186
VL  - 180
IS  - 3 Suppl
N2  - UNLABELLED: U.S. Marines perform mission tasks under heavy loads which may compromise performance of combat tasks. However, data supporting this performance decrement are limited. <br><br>PURPOSE: The aim of this study was to determine the effects of load on performance of combat-related tasks. <br><br>METHODS: Subjects (N = 18) ran a modified Maneuver Under Fire ([MANUF], 300 yards [yd] total: two 25-yd sprints, 25-yd crawl, 75-yd casualty drag, 150-yd ammunition can carry, and grenade toss) portion of the U.S. Marine Corps Combat Fitness Test under 4 trial conditions: neat (no load), 15%, 30%, and 45% of body weight, with a shooting task pre- and post-trial. <br><br>RESULTS: There was a significant increase in total time to completion as a function of load (p < 0.0001) with a relationship between load and time (r = 0.592, p < 0.0001). Pre- to post-MANUF shot accuracy (p = 0.005) and precision (p < 0.0001) was reduced. <br><br>CONCLUSION: Short aerobic performance is significantly impacted by increasing loads. Marksmanship is compromised as a function of fatigue and load. These data suggest that loads of 45% body weight increase time to cover distance and reduce the ability to precisely hit a target.<p />  <p>Language: en</p>
LA  - en
SN  - 0026-4075
UR  - http://dx.doi.org/10.7205/MILMED-D-14-00432
ID  - ref1
ER  -