There is strong evidence for a positive association between CRF and cluster of PF with AP in cross-sectional studies ; and evidence from longitudinal studies for a positive association between cluster of PF and AP ; the relationship between muscular strength and flexibility with AP remains uncertain
Physical fitness ( PF ) is a construct of health- and skill-related attributes which have been associated with academic performance ( AP ) in youth .
This study aim ed to review the scientific evidence on the association among components of PF and AP  in children and adolescents .
Body mass index, fitness and physical activity from childhood through adolescence
Background Obesity , sedentary lifestyle and poor cardiorespiratory fitness in childhood may increase the risk of health problems later in life . Purpose The authors studied the association of early childhood weight status with cardiorespiratory fitness and leisure-time physical activity ( LTPA ) in adolescence . The stability and associations of LTPA and fitness from childhood through adolescence were also studied . Methods  Body mass index ( BMI ) was assessed annually since birth in a prospect i ve , longitudinal study . The mean BMI between ages 2 and 7 years indicated weight status at preschool age . Fitness was studied with a shuttle run test at age 9 and with a maximal cycle ergometer test at age 17 . The same question naire was used to assess LTPA at age 9 , 13 and 17 . Complete data on preschool BMI , LTPA at ages 13 and 17 and fitness at age 17 years was provided by 351 children , while fitness and LTPA data were available for 74 children at ages 9 and 17 . Results Preschool BMI was inversely associated with fitness in adolescence independently of adolescent LTPA ( p=0.0001 ) . Children who had a high preschool BMI but whose weight status was reduced in adolescence had similar fitness in adolescence as the children with a persistently low BMI . Regardless of the fitness level in childhood , the children whose LTPA increased between age 9 and 17 had a similar adolescent fitness level as persistently active subjects . Conclusions It is important to maintain a healthy body weight and a physically active lifestyle from very childhood through adolescence to improve fitness during adolescence
There is strong evidence for a positive association between CRF and cluster of PF with AP in cross-sectional studies ; and evidence from longitudinal studies for a positive association between cluster of PF and AP ; the relationship between muscular strength and flexibility with AP remains uncertain
Physical fitness ( PF ) is a construct of health- and skill-related attributes which have been associated with academic performance ( AP ) in youth .
This study aim ed to review the scientific evidence on the association among components of PF and AP  in children and adolescents .