RT Journal Article T1 The omni scale is not suitable for assessing self-perceived exertion during physical activity in preschoolers A1 Ayán Pérez, Carlos Luis A1 Diz Gomez, José Carlos A1 Varela Martinez, Silvia A1 Sanchez Lastra, Miguel Adriano K1 2411.06 Fisiología del Ejercicio K1 5801.06 Evaluación de Alumnos K1 6106.09 Procesos de Percepción AB Introduction: We aimed to identify the utility, reliability, and validity of an adapted version of the OMNI self-perceived exertion (PE) rating scale in preschoolers. Population and methods: Firstly, 50 (mean age ± standard deviation [SD] = 5.3 ± 0.5 years, 40% girls) performed a cardiorespiratory fitness (CRF) test twice, with a one-week interval between assessments, and rated their PE either individually or in groups. Secondly, 69 children (mean age ± SD = 4.5 ± 0.5 years, 49% girls) performed two CRF tests, separated by a one-week interval, twice and rated their self-PE. Thirdly, the heart rate (HR) of 147 children (mean age ± SD = 5.0 ± 0.6 years, 47% girls) were compared against self-rated PE after finishing the CRF test. Results: Self-assessed PE differed when the scale was administered individually (e.g., 82% rated PE with 10) or in groups (42% rated PE with 10). The scale showed poor test–retest reliability (ICC:0.314-0.031). No significant associations were found between the HR and PE ratings. Conclusions: An adapted version of the OMNI scale was found not suitable for assessing self-PE in preschoolers. PB Children SN 22279067 YR 2023 FD 2023-01-29 LK http://hdl.handle.net/11093/4469 UL http://hdl.handle.net/11093/4469 LA eng NO Children, 10(2): 238 (2023) DS Investigo RD 11-dic-2024