title: Omni scale rating of perceived exertion at ventilatory breakpoint by direct observation of children's kinematics.
abstract: Direct kinematic observation was used to measure ratings of perceived exertion at the ventilatory breakpoint (RPE-Vpt) in 10- to 14-yr.-old girls (n=22) and boys (n=22). RPE for the overall body, legs, and chest were simultaneously estimated by a trained observer and self-rated by a subject during treadmill exercise using the Children's OMNI-Walk/Run Scale. Subjects' heart rate and oxygen consumption were measured during each minute of exercise. Vpt for the girls and boys, respectively, were 64.2 and 66.5% VO2 max. RPE-Vpt ranged from 6.0 to 6.5 Overall, 7.1 to 7.6 Legs, and 5.0 to 5.5 Chest for both the observation and self-rating procedures. Responses indicated (a) RPE-Vpt (Overall, Legs, Chest) did not differ (p>.05) between the observer and self-rating procedures and (b) Observer RPE-Vpt-Legs was greater (p<.05) than RPE-Vpt-Chest. Findings validated direct kinematic observation to code group-normalized RPE-Vpt for girls and boys performing treadmill exercise.
authors: Center for Exercise and Health-Fitness Research University of Pittsburgh, PA 15261, USA. rrobert@pitt.edu
authors: Robert J
authors: RJ
authors: Robertson
authors: Fredric L
authors: FL
authors: Goss
authors: Deborah J
authors: DJ
authors: Aaron
authors: A C
authors: AC
authors: Utter
authors: E
authors: E
authors: Nagle
mesh_terms: D000293:Adolescent; D001696:Biomechanical Phenomena / Q000379:methods*; D002648:Child; D002652:Child Behavior / Q000502:physiology*; D005080:Exercise Test / Q000706:statistics & numerical data; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007866:Leg / Q000502:physiology; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D010465:Perception / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D012123:Pulmonary Ventilation / Q000502:physiology; D012143:Respiratory Physiological Phenomena; D013909:Thorax / Q000502:physiology