What are the risk factors of housekeeping?

The main risk factors for repetitive motion injuries (RMIs) in housekeeping are:

• heavy physical workload and excessive bodily motions which are a high risk for back injuries
• forceful upper limb motions in awkward positions which are a high risk for neck or shoulder and arm injuries

Space limitations require workers to use many uncomfortable postures. These are:

• standing or walking
• stooping
• squatting
• kneeling
• stretching
• reaching
• bending
• twisting
• crouching

A housekeeper changes body position every three seconds while cleaning a room. If we assume that the average cleaning time for each room is twenty-five minutes, we can estimate that a housekeeper assumes 8,000 different body postures every shift.
In addition, forceful movements while using awkward body positions include lifting mattresses, cleaning tiles, and vacuuming every shift. Housekeeping is a physically demanding and very tiring job. It can be classified as "moderately heavy" to "heavy" work because the energy required is approximately 4 kilocalories per minute (4 kcal/min.)

http://www.ccohs.ca/oshanswers/occup_workplace/hotel_housekeeping.html