Motor competence, physical activity, and perceived motor competence: A relational systems approach.

Being and perceiving oneself as proficient in motor skills seems essential for an active lifestyle; conversely, being active and perceiving oneself as proficient may be associated with greater motor competence. By expanding the causal path view about the relationship between active and healthy developmental system elements, this study tested the mediation hypothesis of perceived motor competence in the relationship between motor competence and physical activity - in both ways - and moderation by developmental phase and sex. This cross-sectional study sampled healthy schoolchildren (n = 379; 8.2 ± 1.7 years; 54.9% boys). Physical activity (questionnaire), motor competence (tests included locomotor and object control skills) and perception of motor competence (a pictorial scale) were assessed. Maximum likelihood structural equation models with fit statistics confirmed the mediation in both ways. Unexpectedly, the relationship between motor competence and physical activity was inverse. Sex was a moderating variable (boys). In a systemic relational paradigm of human development, perceived motor competence, motor competence, and physical activity interact in an active and healthy behavioural system, but the complexities of understanding how these elements relate to one another across childhood point to the need for future longitudinal studies.

Breaking up classroom sitting time with cognitively engaging physical activity: Behavioural and brain responses.

INTRODUCTION: Classroom-based active breaks are a feasible and effective way to reduce and break up sitting time, and to potentially benefit physical health in school children. However, the effect of active breaks on children's cognitive functions and brain activity remains unclear. OBJECTIVE: We investigated the impact of an active break intervention on typically developing children's cognitive functions and brain activity, sitting/standing/stepping, on-task behaviour, and enjoyment. METHODS: Up to 141 children, aged between 6 and 8 years (46% girls), were included, although about half of them completed two of the assessments (n = 77, working memory; n = 67, dorsolateral prefrontal cortex haemodynamic response). Classrooms from two consenting schools were randomly allocated to a six-week simple or cognitively engaging active break intervention. Classrooms from another school acted as a control group. The main analyses used linear mixed models, clustered at the class level and adjusted for sex and age, to investigate the effects of the interventions on response inhibition, lapses of attention, working memory, event-related brain haemodynamic response (dorsolateral prefrontal cortex). The mediating effects of sitting/standing/stepping on cognition/brain activity were also explored. To test intervention fidelity, we investigated differences by group on the change values in children's sitting, standing, and moving patterns during class/school time using linear mixed models. Generalized linear mixed models clustered at the individual level were used to examine on-task behaviour data. For the intervention groups only, we also assessed children's perceived enjoyment, physical exertion and mental exertion related to the active breaks and compared the results using independent t-tests. RESULTS: There was a significantly greater positive change in the proportion of deoxygenated haemoglobin in the left dorsolateral prefrontal cortex of children assigned to cognitively engaging active breaks compared to the control group (B = 1.53 × 10-07, 95% CI [0.17 × 10-07, 2.90 × 10-07]), which under the same cognitive performance is suggestive of improved neural efficiency. Mixed models showed no significant effects on response inhibition, lapses of attention, working memory. The mediation analysis revealed that the active breaks positively affected response inhibition via a change in sitting and standing time. The sitting, standing, and moving patterns and on-task behaviour were positively affected by the active breaks at end of trial, but not at mid-trial. Children in both intervention groups showed similarly high levels of enjoyment of active breaks. CONCLUSION: Cognitively engaging active breaks may improve brain efficiency in the dorsolateral prefrontal cortex, the neural substrate of executive functions, as well as response inhibition, via effects partially mediated by the change in sitting/stepping time. Active breaks can effectively reduce sitting and increase standing/stepping and improve on-task behaviour, but the regular implementation of these activities might require time for teachers to become familiar with. Further research is needed to confirm what type of active break best facilitates cognition.

Feasibility of breaking up sitting time in mainstream and special schools with a cognitively challenging motor task.

BACKGROUND: Children spend ≤70% of the school day sitting in class. Classroom-based active breaks can benefit children's physical health, but if the breaks are cognitively demanding (i.e., combine physical exertion and mental engagement), they may also improve focus and cognitive functions. Teachers and students play a crucial role in the successful implementation of active breaks, and their perspectives are critical to the feasibility of these strategies. The aim of this study was to assess the feasibility of implementing a cognitively challenging motor task as an active break in mainstream and special primary schools. METHODS: A total of 5 teachers in 2 mainstream schools and 7 teachers in 1 special school (attended by children with neurodevelopmental disorders) attended a 20-min training on how to implement a 4-min cognitively challenging active break, before conducting a feasibility trial (twice a day for 1 week). To understand individual perceptions, one-on-one semistructured interviews were conducted before and after the trial with teachers, and focus group interviews were conducted with typically developing children after the trial. Questions were based on a predefined framework for feasibility studies. All interviews were audio recorded, transcribed and analyzed in NVivo 11 using a framework approach. A total of 12 teachers (11 females; 7 between 20 and 34years old) and 34 children (16 girls; 9.3 ± 1.7years, mean ± SD) participated in the interviews. RESULTS: In mainstream schools, teachers viewed the cognitively challenging motor task as appropriate and potentially beneficial for children's health and focus. Children reported enjoying the active breaks. Teachers in special schools viewed the task as complex and potentially frustrating for children. In both school types, children's disruptive behavior and lack of time were seen as the main potential barriers to implementation. The use of music, videos, visual cards, and support staff were noted as potential facilitators. CONCLUSION: The cognitively challenging motor task was a feasible way to interrupt children's sitting time and promote physical activity in mainstream schools, but required changes in special schools. Further research could investigate the effectiveness of these types of task interruptions on children's physical and cognitive health.