title: Objective classification of vehicle seat discomfort.
abstract: The objective of this study was to identify how physiological measures relate to self-reported vehicle seating discomfort. Twelve subjects of varied anthropometric characteristics were enrolled in the study. Subjects sat in two seats over a 2-h period and were evaluated via three physiological measures (near-infrared spectroscopy, electromyography and pressure mapping) yielding six testing sessions. Subjective discomfort surveys were recorded before and after each session for nine regions of the body. Conditional classification discomfort models were developed through dichotomised physiological responses and anthropometry to predict subjective discomfort in specific body locations. Models revealed that subjects taller than 171 cm with reduced blood oxygenation in the biceps femoris or constant, low-level muscle activity in the trapezius tended to report discomfort in the lower extremities or neck, respectively. Subjects weighing less than 58 kg with reduced blood oxygenation in the biceps femoris or unevenly distributed pressure patterns tended to report discomfort in the buttocks. The sensitivities and specificities of cross-validated models ranged between 0.69 and 1.00.
authors.affiliation: a Biodynamics Laboratory, Department of Integrated Systems Engineering , The Ohio State University , 210 Baker Systems Engineering, 1971 Neil Avenue, Columbus , OH 43210 , USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Le
authors.forename: Joseph
authors.initials: J
authors.lastname: Rose
authors.forename: Gregory
authors.initials: G
authors.lastname: Knapik
authors.forename: William S
authors.initials: WS
authors.lastname: Marras
mesh_terms: D000293:Adolescent; D000328:Adult; D001336:Automobiles; D002081:Buttocks; D004576:Electromyography; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal; D059352:Musculoskeletal Pain / Q000503:physiopathology / Q000517:prevention & control*; D009142:Musculoskeletal Physiological Phenomena; D009333:Neck; D011187:Posture; D011312:Pressure; D019265:Spectroscopy, Near-Infrared; D055815:Young Adult
keywords: car; physiological discomfort; seating; sitting