Table 1.

A list of shoulder task and sub-task.

Task ID	Shoulder Task	Sub-Task A	Sub-Task B	Sub-Task C
T1	Cleaning head	Lifting hands toward head	Washing head	Putting hands down
T2	Cleaning upper back and shoulder	Lifting hands toward upper back and shoulder	Washing upper back and shoulder	Putting hands down
T3	Cleaning lower back	Lifting hands towards lower back	Washing lower back	Putting hands down
T4	Placing an object on a high shelf	Lifting the object toward the shelf	Holding the hands on the shelf for few seconds	Putting hands down
T5	Putting/Removing an object into/from the back pocket	Putting an object into the back pocket	Holding the hands in the back pocket for few seconds	Removing an object from the back pocket