Zoekresultaten

Infant Motor Milestones and Childhood Overweight:

Background: Poor motor skill competence may influence energy balance with childhood overweight as a result. Our aim was to investigate whether the age of motor milestone achievement has changed over the past decades and whether this change may contribute to the increasing trend observed in childhood overweight. Methods: Motor skill competence was assessed in children from the Young Netherlands Twin Register born between 1987 and 2007. Follow-up ranged from 4 up to 10 years. Weight and height were assessed at birth, 6 months, 14 months, and 2, 4, 7, and 10 years. Results: Babies born in later cohorts achieved their motor milestones ‘crawling’, ‘standing’, and ‘walkingunassisted’ later compared to babies born in earlier cohorts (N = 18,514, p <0.001). The prevalence of overweight at age 10 was higher in later cohorts (p = 0.033). The increase in overweight at age 10 was not explained by achieving motor milestones at a later age and this persisted after adjusting for gestational age, sex, and socioeconomic status. Conclusion: Comparing children born in 1987 to those born in 2007, we conclude that children nowadays achieve their motor milestones at a later age. This does not however, explain the increasing trend in childhood overweight.

The effects of the COVID-19 lockdown on motor skill development of 6- and 7-year old children in the Netherlands

The closing of schools and sports clubs during theCOVID-19 lockdown raised questions about thepossible impact on children’s motor skilldevelopment. Therefore we compared motorcompetence development over a one-year periodamong four different cohorts of primary schoolchildren. A total of 992 children from 9 primaryschools participated in this study (age 5 – 7; 47,5%boys) and were assessed two times, in grade 3 (T1)and in grade 4 (T2). Children in control group 1 and lockdown group 1 were assessed a third time aftertwo years (T3). Motor competence was measuredusing the 4-Skills Test. The mixed factorial ANOVAwith post hoc tests shows no significant differencesin motor development over the study period betweenthe lockdown groups and control groups (p > 0.05),but does show a difference between the twolockdown groups from T1 to T2 (p = 0.008). Whilesocioeconomic status (SES) was a modifier, sex andmotor ability did not modify the effects of thelockdowns. Our data show that the COVID-19lockdowns in the Netherlands did not generallyaffect motor development of young children. Incontrast, many studies have confirmed clear effectsof the pandemic lockdowns on physicalactivity1,2,3. Our study highlights the complexity ofboth motor skill development and the factors relatedto the pandemic lockdowns. We therefore suggestthat children’s motor skill development should beclosely monitored in the upcoming years.Specifically, we should pay attention to individualdifferences since it is still possible that certainchildren are impacted by the pandemic lockdowns.Moreover, long-term effects might emerge in thefuture.References1. de Sá, C. dos S. C., Pombo, A., Luz, C.,Rodrigues, L. P., & Cordovil, R. (2021). Covid-19social isolation in brazil: effects on the physicalactivity routine of families with children. RevistaPaulista de Pediatria, 39, e2020159.2. Hurter, L., McNarry, M., Stratton, G., &Mackintosh, K. (2022). Back to school afterlockdown: The effect of COVID-19 restrictions onchildren’s device-based physical activity metrics.Journal of Sport and Health Science, 11(4), 530–536.3. Moore, S. A., Faulkner, G., Rhodes, R. E.,Brussoni, M., Chulak-Bozzer, T., Ferguson, L. J.,Mitra, R., O’Reilly, N., Spence, J. C., Vanderloo, L.M., & Tremblay, M. S. (2020). Impact of theCOVID-19 virus outbreak on movement and playbehaviours of Canadian children and youth: Anational survey. International Journal of BehavioralNutrition and Physical Activity, 17(1), 85.

Gymmermansoog

Assessing Children's Fine Motor Skills With Sensor-Augmented Toys: Machine Learning Approach

BACKGROUND: Approximately 5%-10% of elementary school children show delayed development of fine motor skills. To address these problems, detection is required. Current assessment tools are time-consuming, require a trained supervisor, and are not motivating for children. Sensor-augmented toys and machine learning have been presented as possible solutions to address this problem.OBJECTIVE: This study examines whether sensor-augmented toys can be used to assess children's fine motor skills. The objectives were to (1) predict the outcome of the fine motor skill part of the Movement Assessment Battery for Children Second Edition (fine MABC-2) and (2) study the influence of the classification model, game, type of data, and level of difficulty of the game on the prediction.METHODS: Children in elementary school (n=95, age 7.8 [SD 0.7] years) performed the fine MABC-2 and played 2 games with a sensor-augmented toy called "Futuro Cube." The game "roadrunner" focused on speed while the game "maze" focused on precision. Each game had several levels of difficulty. While playing, both sensor and game data were collected. Four supervised machine learning classifiers were trained with these data to predict the fine MABC-2 outcome: k-nearest neighbor (KNN), logistic regression (LR), decision tree (DT), and support vector machine (SVM). First, we compared the performances of the games and classifiers. Subsequently, we compared the levels of difficulty and types of data for the classifier and game that performed best on accuracy and F1 score. For all statistical tests, we used α=.05.RESULTS: The highest achieved mean accuracy (0.76) was achieved with the DT classifier that was trained on both sensor and game data obtained from playing the easiest and the hardest level of the roadrunner game. Significant differences in performance were found in the accuracy scores between data obtained from the roadrunner and maze games (DT, P=.03; KNN, P=.01; LR, P=.02; SVM, P=.04). No significant differences in performance were found in the accuracy scores between the best performing classifier and the other 3 classifiers for both the roadrunner game (DT vs KNN, P=.42; DT vs LR, P=.35; DT vs SVM, P=.08) and the maze game (DT vs KNN, P=.15; DT vs LR, P=.62; DT vs SVM, P=.26). The accuracy of only the best performing level of difficulty (combination of the easiest and hardest level) achieved with the DT classifier trained with sensor and game data obtained from the roadrunner game was significantly better than the combination of the easiest and middle level (P=.046).CONCLUSIONS: The results of our study show that sensor-augmented toys can efficiently predict the fine MABC-2 scores for children in elementary school. Selecting the game type (focusing on speed or precision) and data type (sensor or game data) is more important for determining the performance than selecting the machine learning classifier or level of difficulty.

The effects of the COVID‑19 lockdowns on motor skill development of 6‑ and 7‑year old children in the Netherlands: a longitudinal study

BackgroundThe closing of schools and sports clubs during the COVID-19 lockdown raised questions about the possible impact on children’s motor skill development. Therefore, we compared motor skill development over a one-year period among four different cohorts of primary school children of which two experienced no lockdowns during the study period (control cohorts) and two cohorts experienced one or two lockdowns during the study period (lockdown cohorts).MethodsA total of 992 children from 9 primary schools in Amsterdam (the Netherlands) participated in this study (age 5 – 7; 47.5% boys, 52.5% girls). Their motor skill competence was assessed twice, first in grade 3 (T1) and thereafter in grade 4 (T2). Children in control group 1 and lockdown group 1 were assessed a third time after two years (T3). Motor skill competence was assessed using the 4-Skills Test, which includes 4 components of motor skill: jumping force (locomotion), jumping coordination (coordination), bouncing ball (object control) and standing still (stability). Mixed factorial ANOVA’s were used to analyse our data.ResultsNo significant differences in motor skill development over the study period between the lockdown groups and control groups (p > 0.05) were found, but a difference was found between the two lockdown groups: lockdown group 2 developed significantly better than lockdown group 1 (p = 0.008). While socioeconomic status was an effect modifier, sex and motor ability did not modify the effects of the lockdowns.ConclusionsThe COVID-19 lockdowns in the Netherlands did not negatively affect motor skill development of young children in our study. Due to the complexity of the factors related to the pandemic lockdowns and the dynamic systems involved in motor skill development of children, caution must be taken with drawing general conclusions. Therefore, children’s motor skill development should be closely monitored in the upcoming years and attention should be paid to individual differences.

Detecting delays in motor skill development of children through data analysis of a smart play device

This paper describes experiments with a game device that was used for early detection of delays in motor skill development in primary school children. Children play a game by bi-manual manipulation of the device which continuously collects ac- celerometer data and game state data. Features of the data are used to discriminate between normal children and children with delays. This study focused on the feature selection. Three features were compared: mean squared jerk (time domain); power spectral entropy (fourier domain) and cosine similarity measure (quality of game play). The discriminatory power of the features was tested in an experiment where 28 children played games of different levels of difficulty. The results show that jerk and cosine similarity have reasonable discriminatory power to detect fine-grained motor skill development delays especially when taking the game level into account. Duration of a game level needs to be at least 30 seconds in order to achieve good classification results.