Physiological Stress
Conditions
Brief summary
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.
Detailed description
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.
Interventions
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.
Sponsors
Sheba Medical Center
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
18 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
* Aged 18-40 years. * Healthy civilian volunteers. * Without known medical illness or medication use.
Exclusion criteria
* The existence or suspicion of existing cardiac or respiratory disease. * Hypertension. * Diabetes. * Psychiatric condition. * Any muscles or skeleton condition. * Any hormonal disease or any other chronic illness that may inhibit participation in the experiment. * Infectious disease 3 days prior to the experiment.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| physiological strain (composite) | 4 days for each participant | The physiological strain will be determined by body core temperature and heart rate of the subjects during a heat tolerance test (HTT). |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Rectal temperature | 4 days for each participant | The rectal temperature will be monitored by a rectal thermistor during each heat tolerance test (HTT). |
| Skin temperature | 4 days for each participant | The skin temperature will be monitored by skin thermistors located at 3 sites (chest, arm and leg). |
| Heart rate | 5 days for each participant | The heart rate will be monitored using a wearable heart rate monitor (Polar® sensor and heart rate monitor watch). |
| Sweat rate (composite) | 4 days for each participant | Sweat rate will be calculated from the patients' body weight and fluid balance. |
Countries
Israel
Outcome results
None listed