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The EPInfant scale is a self-assessment for children that measures perceived exertion (PE) during physical exercise. This study aimed to translate the scale into Arabic (EPInfant-Ar) and test its psychometric properties. The revised version was tested for face and content validity. Oxygen saturation, heart rate (HR), and ratings of perceived exertion were measured during a 3-minute step test with a sample of 93 children. PE and HR were examined using the Pearson correlation coefficient ( r ) to assess the concurrent validity. Internal consistency and test-retest reliability were calculated using Cronbach’s alpha ( α ), intraclass correlation coefficient (ICC 2,1 ), and r coefficient. A minimum detectable change with 95% confidence interval (MDC 95 ) and percentage of change (MDC%) was also measured. Content validity showed an excellent level of expert agreement. There was a moderate correlation between PE rated by the scale and HR ( r  = 0.47,  p  &lt; .001). The internal consistency and test-retest reliability were acceptable ( α  = 0.89; ICC 2,1=  0.81; 95%Cl: 0.71–0.87,  r  = 0.81) with low measurement error (MDC 95  = 2.66 and MDC% = 61.10%). The EPInfant-Ar scale was considered valid and reliable for assessing PE after physical exercises in typically developing children aged 6–16 years.

Psychometric Properties of the Arabic Version of the EPInfant Scale among Typically Developing Children Aged 6–16 Years