[Effect of alternating overloads on the activities of a human operator wearing a protective helmet].
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D000293:Adolescent; D000328:Adult; D001696:Biomechanical Phenomena; D001794:Blood Pressure / Q000502:physiology; D004576:Electromyography; D018470:Gravity, Altered / Q000009:adverse effects*; D006260:Head Protective Devices / Q000592:standards; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D011603:Psychophysiology; D013131:Spine / Q000502:physiology; D013997:Time Factors; D016474:Weight-Bearing / Q000502:physiology; D014937:Work / Q000502:physiology*