Carbohydrate Mouth-rinsing Improves Overtime Physical Performance In Male Ice Hockey Players

Abstract

PURPOSE:To determine prevalence of American children and youth meeting the recommendation of the physical activity (PA) guidelines using the data of the 2012 NHANES National Youth Fitness Survey (NNYFS 2012). METHODS:The weighted physical activity data (N = 41,159,799, 51% boys for 6-15 yr. old) collected using ActiGraph in NNYFS 2012 were analyzed to determine the prevalence of meeting the recommendation of the PA guidelines. Specifically, after the released data in Monitor-Independent Movement Summary (MIMS) unit were converted to the MIMS-EQ-Count, an equivalent of ActiGraph count, based on the results of a test equating study by Qin et al. (2021), the prevalence was computed using the cutoff scores by Chandler et al. (2015) originally developed for 8-12 yr. old. RESULTS: Unexpected, very high pass rates (1 = 100%) were observed based on the daily 120 min (SHAPE America, 2020) moderate and vigorous PA (MVPA) and 180 min PA, including 60 min MVPA (WHO, 2019) cutoffs (Boys, Girls, Total). The extremely high passing rates observed were likely caused by the wrist site, where ActiGraph was worn, employed in NNYFS 2012 and the noise movements by hands (e.g., playing the computer games) that were mistakenly classified as MVPA. Using MIMS, rather than ActiGraph counts, as the unit of the data was another problem since MIMS' PA intensity cutoff scores have not been established and validated. Together, due to failing to create trustful MVPA data and passing rates, these two flaws made PA data from NNYFS 2012 less meaningful and useful. CONCLUSIONS: The extremely high prevalence of US children and youth meeting PA recommendations in NNYFS 2012 was likely caused by two major flaws when collecting PA by wearing ActiGraph on wrist and releasing the data in MIMS unit.