The outcome variable is the physical activity composite score in 4th grade. Third, to analyze the effects of motor competence and physical self-concept on physical activity (i.e., two main effects and the interplay of both), a second degree polynomial regression with response surface analysis (...
(supplementary material 1) (Welch et al.,2012). The protocol for the genEffects review was published previously (Demetriou et al.,2019) and is also registered with PROSPERO (ref CRD42018109528). There were no protocol amendments for the present study, except that the GRADE framework was not ...
(female; n = 29). AP was calculated using the grade point averages (GPA) in Mathematics, Science, and Arabic. Additionally, the Short Form of the International Physical Activity Questionnaire (IPAQ) was utilized.Results:Four parameters (peak height velocity [PHV], science, Arabic, vigorous PA...