“…About this, it is important to evaluate the changes and relations of BC and CRF in children and youth according to school physical education class participation (BLAIR;CHENG;HOLDER, 2001;COLQUITT et al, 2016;FAIRCLOUGH, 2003;KAHAN;LANGFORD et al, 2014;MILANESE et al, 2020), considering the school grade context, effects of sex, and age on BC and CRF (BARANOWSKI et al, 2013;BERGMANN et al, 2014;MILANESE et al, 2020;VALENTE-DOS-SANTOS et al, 2015;WERNECK et al, 2019). Some research suggests that is possible to increase the CRF condition and also is probable to reduce the fatness in BC at physical education interventions (BRAND et al, 2019(BRAND et al, , 2020GARCIÁ-HERMOSO et al, 2020;LEMES et al, 2019;OLIVEIRA et al, 2017). It occurs when well-planned and well-applicable classes with physical exercise, gymnastics, sports in school context (BRAND et al, 2019(BRAND et al, , 2020GARCIÁ-HERMOSO et al, 2020;LEMES et al, 2019;OLIVEIRA et al, 2017).…”