Sleep Deprivation
Conditions
Keywords
sleep, HTT, heat illness
Brief summary
The purpose of the present study is to evaluate the effect of partial and complete sleep deprivation on exercise heat tolerance. Twelve healthy young male volunteers will participate in the study. They will arrive to our lab four times, in each visit the will undergo VO2 test and Heat Tolerance Test (HTT) after sleeping different amount of hours.
Detailed description
The volunteers will arrive to our lab fout times- During their first visit they will go through a VO2 max test in order to evaluate their aerobic fitness, and their physiological efficiency will be measured. During their second visit they will go through an exercise heat tolerance test according to our validated protocol after a full night sleep. During the third and fourth visit they will go through an exercise heat tolerance test and a measurement of their physiological efficiency after a partial and complete sleep deprivation, respectively. The physiological tests will take place in the heat chamber that is located at the Heller Institute of Medical Research. The results will be then analyzed, and a comparison between the physiological measurements during the heat tolerance tests and the physiological efficiency tests after the various sleep conditions will be performed.
Interventions
OTHERpartial and complete sleep deprivation
The subjects will visit our labs 4 times. The second visit will be used as the experimental control. During the third and fourth visits the subject will go through an exercise heat tolerance test and a measurement of their physiological efficiency after a partial and complete sleep deprivation, respectively.
Sponsors
International Diabetes Federation
Sheba Medical Center
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
18 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* age 18-30 * healthy * after medical checkup * after signing concent form
Exclusion criteria
* heart disease * respiratory disease * baseline bp above 140/90 mmHg * sleep disorders * diabetes * anhydrosis * skin disease * acute illness
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| oxygen consumption | experimental days 1,3,4 | volunteer's oxygen consumption (VO2) will be monitored continuously with a metabolic chart (ZAN), while running for 10 min on a treadmill under comfortable environmental conditions.Each volunteer will undergo the test 4 times. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Skin temperature | experimental days 2,3,4 | The volunteers will undergo Heat Tolerance Test (HTT). Their skin temperature will be measured by skin thermistors and will be monitored continuously and viewed by the attending medical staff. Automatically all data will be recorded by the monitoring Biopac system. |
| Rectal temperature | experimental days 2,3,4 | The volunteers will undergo heat tolerance test. Their rectal temperature will be measured by rectal thermistor and will be monitored continuously and viewed by the attending medical staff. Automatically all data will be recorded by the monitoring Biopac system. |
| Heart rate | experimental days 1,2,3,4 | During the HTT (Heat Tolerance Test) and the VO2 test heart rates will be monitored continuously and will be stored by a heart rate wristwatch, (POLAR, Finland). |
Countries
Israel
Outcome results
None listed