Israel ministry of defense is examining a new protective undergarment of GORE company (chempark fabric) for the police forces. The goal of this research is to perform a comparative experiment in order to evaluate the physiological strain induced by a BC protective undergarment under exercise-heat stress conditions.
In order to physiologically evaluate a new BC protective garment for the Israeli police use under exercise-heat stress conditions, 10 young and healthy civilian volunteers will participate in this study. The subjects will undergo 5 experiment days: Recruitment day, one day of acclimatization to heat, and 3 days of performing experiment protocol, each day dressed with different protective garment (Protective garment in current use + NBC mask, new BC protective undergarment + standard combat uniforms, new BC protective undergarment + standard combat uniforms + NBC mask). Core (rectal) and skin temperature and heart rate will be monitored continuously, liquid balance will be recorded.the physiological heat strain will be assessed and compared between the different protective garments.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
PREVENTION
Masking
NONE
Enrollment
10
acclimatization day protocol: 2 hour effort performed in a climatic chamber, which include walk on a treadmill at 5 Km/h on a 2% incline under heat conditions (40 deg. centigrade \& 40% RH) Core (rectal) and skin temperature and heart rate will be monitored continuously experiment days (3 days): 2 hour effort (2 cycles of: 50 min walk and 10 min rest-sitting) performed in a climatic chamber, which include walk on a treadmill at 5 Km/h on a 2% incline under heat conditions (30 deg. centigrade \& 60% RH) Core (rectal) and skin temperature and heart rate will be monitored continuously.
Sheba medical center
Tel Litwinsky, Ramat- Gan, Israel
physiological strain (composite)
The physiological strain will be determined by body core temperature and heart rate of the subjects during a heat tolerance test (HTT).
Time frame: 4 days for each participant
Rectal temperature
The rectal temperature will be monitored by a rectal thermistor during each heat tolerance test (HTT).
Time frame: 4 days for each participant
Skin temperature
The skin temperature will be monitored by skin thermistors located at 3 sites (chest, arm and leg).
Time frame: 4 days for each participant
Heart rate
The heart rate will be monitored using a wearable heart rate monitor (Polar® sensor and heart rate monitor watch).
Time frame: 5 days for each participant
Sweat rate (composite)
Sweat rate will be calculated from the patients' body weight and fluid balance.
Time frame: 4 days for each participant
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