DOI: 10.5061/dryad.s1rn8pk94
title: Data from: Ice vests extend physiological work time while wearing explosive ordnance disposal protective clothing in hot and humid conditions

description: Explosive ordnance disposal (EOD) technicians may be required to work in
 hot humid environments while wearing heavy protective clothing. We
 investigated the ability of an ice vest to attenuate physiological strain
 and subsequently extend work tolerance. Eight male participants (24.3±4.1
 yr, 51.3±4.1 mL·kg-1·min-1) walked (4.5 km·h-1) in simulated hot and humid
 conditions (35 °C; 50% relative humidity). Participants wore either an EOD
 suit (CON) or EOD and ice vest (IV). Heart rate, core and skin temperature
 were recorded continuously. Participants walked longer in IV compared to
 CON (8.1±7.4 min, p&lt;.05). Over 90% of trials were terminated based
 on participants reaching 90% of their maximum heart rate. IV resulted in
 cooled skin (p&lt;.001) and a physiologically negligible change in
 core temperature (p&lt;.001). A condition by time interaction was
 identified for heart rate (p&lt;.001), with a lower rate of rise in
 the IV condition. The cardiovascular inefficiency that limited performance
 was attenuated in the IV condition. Heat loss from the periphery was
 facilitated by the ice vest, thus the observed reduction in heart rate may
 reflect the preservation of central blood volume. The results identify the
 efficiency of a simple, inexpensive ice vest to assist EOD technicians
 working in the heat.
description: # Data from: Ice vests extend physiological work time while wearing
 explosive ordnance disposal protective clothing in hot and humid
 conditions Authors: Kate P Hutchins, Matthew J Maley, Aaron J E Bach,
 Geoffrey M Minett, Kelly L Stewart, Ian B Stewart This study aimed to
 investigate the effect of an ice vest on physiological responses and work
 capacity while in an EOD ensemble in simulated conditions. It was
 hypothesised that the ice vest would alleviate the physiological strain
 and extend work time while wearing the EOD ensemble in hot, humid
 conditions. The authors have provided the raw physiological data
 (EOD_physiological_data.csv) and the work time data alongside the
 termination criteria (EOD_work_time_data.csv). ### **Description of the
 data and file structure** ##### Measures in EOD\_physiological\_data.csv
 Work Time (minutes) - abbreviated to 'Time' Core (rectal)
 Temperature (°C) - abbreviated to 'Tc' Mean Skin Temperature
 (°C) - abbreviated to 'Tsk' Heart Rate (bpm) - abbreviated to
 'HR' Participant Number - abbreviated to 'ID' #####
 Conditions in EOD\_physiological\_data.csv and EOD\_work\_time\_data.csv
 Explosive Ordnance Disposal - abbreviated to 'EOD' and denoted
 as Condition ID number '1' Explosive Ordnance Disposal and Ice
 Vest - abbreviated to 'EOD+IV' and denoted as Condition ID
 number '2' ##### Termination Criteria in
 EOD\_work\_time\_data.csv 90% of Heart Rate Maximum - abbreviated to
 'HR' Walking for 60 minutes - abbreviated to 'Time'
 ### **Sharing/Access information** Data are original from human data
 collection and not sourced. Data are only available on Dryad Repository.
 ### **Code/Software** All data analysis was undertaken in R (version
 4.0.3).