Energy expenditure of walking with different types of armored vests in military personnel - A pilot study

Brinnell Caszo, Zubaidah Hasain, Justin Gnanou


Use of armored vests is an additional burden on the wearer, and has an impact on the ability to function. In view of the limitations in the amount of rations that can be carried, the aim of this study was to determine the energy cost of wearing armored vests and compare the energy cost of 6 different types of vests. Six well trained volunteers from the military training academy were chosen. Their basal metabolic rate was measured. Then they used 6 different vests in a cross-over study design, and their energy expenditure was measured using an indirect calorimeter, while walking on a treadmill. Data from our study revealed that using the vests, energy expenditure was increased by an average of 2.7 Kcal/Kg/day over basal metabolic rate. However, there was no significant difference between the 6 different vests. Thus we were able to quantify the amount of additional energy that is required for walking at a speed of 3.5km/hr. This study also revealed that there is no difference in energy expenditure between different types of armored vests. Further investigation is required to study the effects at greater workloads to document the effect of the vests.


armored vests, basal metabolic rate, energy expenditure, indirect calorimetry

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