Participants performed the same writing task using anelectronic pencil to transcribe words or rewrite a health sciences review article onto a blank paper application which was printed outonto paper and laid by the right side of the tablet continuously for 2 h in the same environment consisting of an identical temperature,light level, and chair attribute. Data on the RULA were assessed by two professional physical therapists. They observed and agreed tosum up RULA score in a cross-sectional analysis on pretest and posttest (2 h after writing task). During data collection the assessors didnot notify participants that they were observed and assessed throughout 2 h of the study. Respiratory function and CV angle wereassessed prior to and subsequent to the study. In addition, fatigue symptom was also assessed after the study. We employed a standardstudent chair that cannot adjustable and tablet with a tilting tool. Respiratory function was measured via spirometer (CareFusionMicroLab), with a CV angle assessment tool for evaluation. Testing was conducted at a physical therapy laboratory room in the afternoonat Burapha university, Thailand.