The doctor is required to document the range of motion findings on the contralateral side however if there was prior injury to the contralateral side which affects the range of motion the doctor should use the normal range of motion as indicated in the guidelines as a baseline. If the range of motion on the injured part is limited by other factors such as obesity the doctor should evaluate using his or her judgement and offer an opinion on functional loss and resulting SLU that are causally related to the work injury.