The force that a worker exerts on an object is a primary risk factor. Muscles and
tendons can be overloaded when you apply a strong force against an object.
Holding a lighter object (such as a mouse) for long periods can also expose
workers to a risk of MSI.
There are three types of activity that require force:
• Force involved in lifting, lowering, or carrying
• Force involved in pushing or pulling
• Grip force
The pictures on pages bellow illustrate these forces in different work activities.
Pushing or pulling
Force is needed for pushing or pulling an object.
Lifting, lowering, or carrying
Lifting, lowering, or carrying an object or person requires force.
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