For the OSHA's Guideline, the risk factors are:
■ Force – The physical struggle required to perform a task (such as heavy lifting, pushing, or pulling) or control equipment and tools;
■ Repetition – Doing the same movements repeatedly for a long time;
■ Awkward and fixed positions – Taking positions that place tension on the body, such as kneeling, squatting, leaning over a counter, or using tools with wrists bent;
■ Contact pressure – pushing the body, or part of the body, against hard or sharp edges or using the hand as a hammer.
As deli clerks, you have to be aware of each of these risk factors daily.
Source:The Occupational Safety and Health Administration (OSHA) Guidelines for Retail and Grocery Stores