Body Movement, Postures, and Positions

The level of ergonomic risk can effectively be determined by performing ergonomic task analyses. This requires the breakdown of an activity into discrete behavioral steps. Once the steps have been sequentially developed, each can be logically broken down into the movements observed. Steps are recorded and used for calculating repetition rates and duration. Ergonomic problems may correlate with frequency and duration of biomechanical motions. 

There are two different systems used to classify and evaluate body movements  

Physiological classification systems examine the way body parts move. 

Operational classification systems group body movements by the particular work activity being performed 

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