The Modified Nordic Questionnaire assesses self-reported musculoskeletal symptoms [39]. It is validated and is among the most frequently used MSD outcome assessment instruments used in ergonomic research [40, 41, 42]. The questionnaire requires a “yes” or “no” response to the following three questions for nine different anatomic sites (neck, shoulder, upper back, lower back, elbow, wrist/hand, hip/thigh, knee, feet): “During the last 4 weeks have you had a job-related ache, pain, discomfort”; “During the last 4 weeks have you been prevented from doing your day’s work due to this condition?” and “During the last 4 weeks have you seen a physician for this condition?” The questionnaire takes about three minutes to complete.