Table 1. Characteristics of included studies.

PA, positive affectivity

Author name	Year	Study design	Study participants/age	Outcome
Hertzman [3]	2000	Observational study	n = 118	Children with poor motor skills were less active than those with better-developed motor skills.
Black et al. [9]	2016	Intervention study	Children aged <3 years	This paper, the first in a three-part series on early childhood development, examines the recent scientific progress and global commitments to early childhood development.
Donnelly et al. [12]	2016	Cross-sectional, longitudinal, acute, or intervention trials	Children aged 5–13 years	PA has a positive influence on cognition as well as brain structure and function.