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Israel ministry of defense is examining a new BC membrane protective garment of BLAUER company constructed with GORE CHEMPAK fabric for the border guard of the police forces. The goal of this research is to perform a comparative experiment in order to evaluate the physiological strain induced by the new protective garment under exercise-heat stress conditions, compared to protective garment in current use.
In order to physiologically evaluate a new BC membrane protective garment for the Israeli police use under exercise-heat stress conditions, 12 healthy volunteers from the border guard will participate in this study.
The subjects will undergo 4 experiment days: Recruitment day, one day of acclimatization to heat, and 2 days of performing experiment protocol, each day dressed with different protective garment (Protective garment in current use + NBC mask, new BC membrane protective garment + 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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| research arm | Experimental | 12 healthy volunteers from the border guard of the police forces will participate in this study. The subjects will undergo 4 experiment days:
3.2 days of performing moderate exercise under hot and humid conditions protocol, each day dressed with different protective garment:
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| exercise under hot and humid conditions protocol | Other | 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 (2 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 (35 deg. centigrade & 60% RH) Core (rectal) and skin temperature and heart rate will be monitored continuously. |
| Measure | Description | Time Frame |
|---|---|---|
| physiological strain (composite) | The physiological strain will be determined by body core temperature and heart rate of the subjects during experiment days with protocol of exercise under heat stress conditions. | 3 days for each participant |
| Measure | Description | Time Frame |
|---|---|---|
| Rectal temperature | The rectal temperature will be monitored by a rectal thermistor (YSI-401) inserted 10 cm past the anal sphincter. | 3 days for each participant |
| Skin temperature | The skin temperature will be monitored by skin thermistors located at 3 sites (chest, arm and leg). |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Ofir Frenkel, M.D | Contact | +972529243399 | Ofir.Frenkel@sheba.health.gov.il |
| Name | Affiliation | Role |
|---|---|---|
| Ofir Frenkel, M.D | Sheba Medical Center | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Sheba medical center | Tel Litwinsky | Ramat- Gan | Israel |
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| BC membrane protective garment | Device |
|
| NBC mask | Device |
|
| 3 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). | 4 days for each participant |
| Sweat rate (composite) | Sweat rate will be calculated from the patients' body weight and fluid balance. | 3 days for each participant |