Correlation Between Childhood Exercise and Cognitive Functioning
Introduction to the Study
A research team from Tokyo has uncovered a significant link between childhood exercise and cognitive benefits in later life. This groundbreaking study is the first to explore the relationship between brain structure and function concerning childhood exercise and adult cognitive performance. The research, led by Professor Toru Ishihara from Kobe University, commenced in 2012.
Study Participants and Methodology
The study involved 214 participants, comprising 104 females and 110 males, aged 26 to 69, recruited from Tokyo and its surrounding areas. Each participant completed surveys detailing their exercise habits during childhood and adulthood. They specified the age of onset, duration, and frequency of their exercise activities. The research utilized the International Physical Activity Questionnaire to measure physical activity, encompassing housework, self-powered transportation, and leisure activities.
Findings on Childhood Exercise
The researchers discovered that exercise participation before the age of 12 correlated positively with cognitive abilities, particularly in “response inhibition”—the capacity to suppress inappropriate behaviors. A specific test, the Go/No-go task, was employed, requiring participants to respond to a frequently shown letter while withholding responses to a less common letter. Results indicated a significant inverse relationship between childhood exercise and the false alarm rate, with no associations found for exercise after age 12.
Impact of Exercise on Brain Connectivity
The study further analyzed brain structure and function using magnetic resonance imaging (MRI). The focus was on brain regions implicated in cognitive control, including the frontoparietal network (FPN), cingulo-opercular network (CON), and default mode network (DMN). The investigation identified 72 brain regions of interest for structural connectivity. Among the 69 networks examined, significant associations were found between childhood exercise and false alarm rates in response inhibition tests. For functional connectivity, 46 networks within 52 regions also demonstrated notable relationships with childhood exercise.
Cortical Thickness and Neurite Density
Researchers assessed various parameters of brain structure, including cortical thickness, neurite density index (NDI), and orientation dispersion index (ODI). The findings revealed that participants who engaged in exercise prior to age 12 had a “significantly lower false alarm rate” in response inhibition tasks when displaying higher cortical thickness in nine specific regions. Additionally, lower ODI in five brain regions and lower NDI in three regions were associated with improved performance in those who exercised early.
Conclusion and Implications
The research team from Kobe University highlighted that no significant associations between brain structure or functional connectivity were observed for exercise participation after age 12. This study illustrates how early childhood exercise can influence brain connectivity and cortical thickness, contributing to cognitive functioning in adulthood. These insights underscore the importance of engaging children in physical activities for long-term cognitive health.
References
Ishihara, T. et al. (2021). Childhood exercise predicts response inhibition in later life via changes in brain connectivity and structure. NeuroImage; 237: 118196. Doi: 10.1016/j.neuroimage.2021.118196.