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| S | | | Severity rate:
The cost in terms of lost workdays (or dollars) of new injuries and illnesses occurring in a given job, production line, work area, department or company. Shearing:
Forces that act in opposite directions, such as the sliding that occurs when a body and its clothing come into contact with the surface of a chair. Shear forces are minimal, which allows the sitter to recline without untucking a blouse or shirt. Shear forces are high in a forward-sloping chair when clothing tends to stay with the seat while the body slides forward.Spinal Disc:
See intervertebral disc.Static loading:
Physical effort or posture that is held and requires muscle contraction for more than a short time. As muscles remain contracted, the blood flow to the muscles is reduced. (Also sustained exertions.) Sustained exertions:
Physical effort or posture that is held and requires muscle contraction for more than a short time. As muscles remain contracted, the blood flow to the muscles is reduced. Also static loading.) | | |
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