Classification and Characterization of Physical Strains During Sorting Series: Physiological Aspects

Study Overview
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Brief Summary
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2 young candidates have tragically died during army pre-recruitment sorting series in 2006. As part of the classification and characterization of the physical aspects of the training, this experiment was requested. We aim at determining the characteristics of physical strains in sorting series, by objective and subjective parameters and evaluating the difficulty levels and intensity of those strains.

Detailed Description
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each subject will perform the following 3 days experiment protocol, consisting of army training exercises: sack carrying exercise; the subjects will go up and down through a steep slope with sand sack on their back (path length is 200 meters,10 repetitions). the first day will also include recruitment and medical examination, in addition to the exercise. crawling exercise; the subjects will crawl with knee's protectors back and forth (path length is 20 meters,15 repetitions). combined exercise: sprints session (path length 600 meter, 3 repetitions),15 min break, sack carrying session (same protocol as first day), 45 min break and crawling session (same protocol as the second day). during all exercises heart rate, core temperature, lactic acid and CPK levels will be monitored continuously.

Official Title
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Classification and Characterization of Physical Strains During Sorting Series: Physiological Aspects

Conditions
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Motor Activity

Intervention / Treatment
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* Other: experiment protocol


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Aged 18-22 years. Healthy civilian volunteers. without skeleton-muscle illnesses. without Infectious disease 2 weeks prior to the experiment. Exclusion Criteria: any physical condition. physician decition.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 22 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: research arm<br>40 subjects will undergo the experiment protocol, total 3 days, each consisting different training exercises. | Other: experiment protocol<br>* each subject will perform the following 3 days experiment protocol, consisting of army training exercises: sack carrying exercise. crawling exercise. combined exercise: sack carrying, crawling and sprints. heart rate, core temperature, lactic acid and CPK levels will be monitored continuously.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| heart rate will be monitored using a wearable heart rate monitor (Polar® sensor and heart rate monitor watch) | The heart rate will be monitored using a wearable heart rate monitor (Polar® sensor and heart rate monitor watch). | 3 experiment days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| CPK measured from blood sample (3ml) in the lab | CPK levels will be measured from blood sample (3ml) in the lab | 3 experiment days | 
| lactic acid measured using lactat-meter (Lactate pro LT-1710) | lactic acid levels from finger blood (5ul) using lactat-meter (Lactate pro LT-1710) | 3 experiment days | 
| body core temperature monitored using telemetry pill | core temperature will be monitored using telemetry pill | 3 experiment days |