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  • Title: Validity of the OMNI rating of perceived exertion scale for children and adolescents with cerebral palsy.
    Author: Fragala-Pinkham M, O'Neil ME, Lennon N, Forman JL, Trost SG.
    Journal: Dev Med Child Neurol; 2015 Aug; 57(8):748-53. PubMed ID: 25627218.
    Abstract:
    AIM: This study evaluated the validity of the OMNI Walk/Run Rating of Perceived Exertion (OMNI-RPE) scores with heart rate and oxygen consumption (VO₂) for children and adolescents with cerebral palsy (CP). METHOD: Children and adolescents with CP, aged 6 to 18 years and Gross Motor Function Classification System (GMFCS) levels I to III completed a physical activity protocol with seven trials ranging in intensity from sedentary to moderate-to-vigorous. VO₂ and heart rate were recorded during the physical activity trials using a portable indirect calorimeter and heart rate monitor. Participants reported OMNI-RPE scores for each trial. Concurrent validity was assessed by calculating the average within-subject correlation between OMNI-RPE ratings and the two physiological indices. RESULTS: For the correlational analyses, 48 participants (22 males, 26 females; age 12y 6mo, SD 3y 4mo) had valid bivariate data for VO₂ and OMNI-RPE, while 40 participants (21 males, 19 females; age 12y 5mo, SD 2y 9mo) had valid bivariate data for heart rate and OMNI-RPE. VO₂ (r=0.80; 95% CI 0.66-0.88) and heart rate (r=0.83; 95% CI 0.70-0.91) were moderately to highly correlated to OMNI-RPE scores. No difference was found for the correlation of physiological data and OMNI-RPE scores across the three GMFCS levels. The OMNI-RPE scores increased significantly in a dose-response manner (F(6,258) =116.1, p<0.001) as exercise intensity increased from sedentary to moderate-to-vigorous. INTERPRETATION: OMNI-RPE is a clinically feasible option to monitor exercise intensity in ambulatory children and adolescents with CP.
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