5. Conclusions
REGRESSION
This study developed and validated a regression equation using accelerometry to estimate PAEE in 11–13-year-old Sri Lankan adolescents (PAEE = [0.001CPM] − 0.112). Further cross-validation studies will improve the generalizability of the newly developed equation and the use of a representative sample of Sri Lankan adolescents with different activities, including a range of free-living activities, is recommended for such validation.This equation will be useful in observational and randomized control trials to determine the effect of physical activity interventions to promote physical activity in children. Further cross-validation studies are required to assess the validity of this new equation using a representative sample of Sri Lankan adolescents with different activities, including a range of laboratory-based and free-living activities.