The efficacy of the TEACH e-Learning course at improving early childhood educators' physical activity and sedentary behaviour self-efficacy, knowledge, intentions, and perceived behavioural control: a randomized controlled trial.

BACKGROUND: Early childhood educators play a critical role in promoting physical activity and reducing sedentary time in childcare centres. However, early childhood educators receive limited specialised pre- and in-service learning opportunities relating to these behaviours and may lack the capacity to effectively engage children in healthy movement behaviours. This study aimed to examine the efficacy of an e-Learning course on increasing early childhood educators' physical activity and sedentary behaviour-related capacities. METHODS: A two-group parallel randomized controlled trial was conducted with early childhood educators in Canada (Mage = 41.78, 97% female). Participants randomized to the intervention group were asked to complete a physical activity and sedentary behaviour e-Learning course within a 4-week period. Participants randomized to the waitlist control condition were assigned to a waitlist to receive the intervention after the testing period. Participants reported on their self-efficacy, knowledge, intentions, and perceived behavioural control relating to physical activity and sedentary behaviours at baseline, post-intervention, and 3 months follow-up. Linear mixed effects models were estimated to determine difference in changes in outcomes from baseline to post-intervention, and follow-up. RESULTS: A total of 209 early childhood educators participated in the study (intervention n = 98; control n = 111). The TEACH e-Learning course was found to be efficacious at improving all of the examined outcomes, with standardized effect sizes ranging from d = 0.58 to d = 0.65 for self-efficacy outcomes, d = 0.66 to d = 1.20 for knowledge outcomes, d = 0.50 to d = 0.65 for intention outcomes, and d = 0.33 to d = 0.69 for perceived behavioural control outcomes post-intervention. The intervention effects were sustained at follow-up for all outcomes apart from perceived behavioural control to limit screen time. Additionally, the magnitude of the effect for knowledge outcomes decreased at follow-up, with standardized effect sizes ranging from d = 0.49 to d = 0.67. CONCLUSIONS: The e-Learning course was highly successful at improving early childhood educators' capacity pertaining to physical activity and sedentary behaviours. Providing training content through e-Learning may be an efficacious approach to providing continual professional learning opportunities relating to physical activity and sedentary time to early childhood educators on a large scale.

Reliability of field- and laboratory-based assessments of health-related fitness in preschool-aged children.

OBJECTIVES: Reliable measurements of health-related fitness-cardiorespiratory endurance, muscular endurance, muscular strength, body composition, and flexibility-are imperative for understanding and tracking health-related fitness from the preschool age. This study aimed to examine the test-retest reliability of field-based (i.e., sit and reach [standard and back-saver], standing long jump, grip strength); and laboratory-based (i.e., Bruce Protocol Treadmill Test, Wingate Anaerobic Test) assessments of health-related fitness in preschool aged children (4-5 years). METHODS: Forty-two typically developing children participated in both assessment time points separated by 2-3 weeks. All fitness assessments were administered individually and repeated in the same order by the same assessor. Heteroscedasticity was examined for each parameter. Intraclass correlation coefficients were calculated to assess test-retest reliability. RESULTS: All parameters were homoscedastic. Test-retest reliability for the field-based tests and Bruce Protocol Treadmill Test parameters were moderate to good. Test-retest reliability for the Wingate Test parameters were good to excellent for maximum pedal rate, peak power, and peak power/kg; mean power and fatigue measured at 10 and 30 s demonstrated moderate to excellent test-retest reliability. CONCLUSION: The standard sit and reach, grip strength, and short-term muscle power from the Wingate test are reliable assessments of health-related fitness in preschool-aged children.

New Insights Into Accelerometer-Measured Habitual Physical Activity and Sedentary Time During Early Recovery in Pediatric Concussion.

PURPOSE: Concussion management is shifting away from a rest-is-best approach, as data now suggest that exercise-is-medicine for this mild brain injury. Despite this, we have limited data on habitual physical activity following concussion. Therefore, our objective was to quantify accelerometer-measured physical activity and sedentary time in children with concussion (within the first month of injury) and healthy controls. We hypothesized that children with concussion would be less active than their healthy peers. METHODS: We performed a secondary analysis of prospectively collected accelerometer data. Our sample included children with concussion (n = 60, 31 females) and historical controls (n = 60) matched for age, sex, and season of accelerometer wear. RESULTS: Children with concussion were significantly more sedentary than controls (mean difference [MD], 38.3 min/d, P = .006), and spent less time performing light physical activity (MD, -19.5 min/d, P = .008), moderate physical activity (MD, -9.8 min/d, P < .001), and vigorous physical activity (MD, -12.0 min/d, P < .001); these differences were observed from 8:00 AM to 9:00 PM. Sex-specific analyses identified that girls with concussion were less active and more sedentary than both boys with concussion (P = .010) and healthy girls (P < .010). CONCLUSION: There is an activity deficit observed within the first month of pediatric concussion. Physical activity guidelines should address this while considering sex effects.

A Matched-Pair Analysis of Gross Motor Skills of 3- to 5-Year-Old Children With and Without a Chronic Physical Illness.

PURPOSE: The purpose of this study was to compare the gross motor skills of children with a chronic physical illness with those of their healthy peers. METHODS: Data for children with a chronic physical illness come from the Multimorbidity in Children and Youth Across the Life Course study, and data from children without a physical illness come from the Health Outcomes and Physical Activity in Preschoolers study. Multimorbidity in Children and Youth Across the Life Course and Health Outcomes and Physical Activity in Preschoolers included children ages 3-5 years and administered the Peabody Development Motor Scales-second edition. Participants were sex and age matched (20 male and 15 female pairs; Mage = 54.03 [9.5] mo). RESULTS: Gross motor skills scores were "below average" for 47% of children with a physical illness compared with 9% of children without a physical illness (P = .003). Matched-paired t tests detected significant differences in total gross motor scores (dz = -0.35), locomotor (dz = -0.31), and object control (dz = -0.39) scores, with healthy children exhibiting better motor skills, and no significant difference in stationary scores (dz = -0.19). CONCLUSIONS: This skill gap may increase burden on children with physical illness and future research should assess gross motor skills longitudinally to establish whether the gap widens with age.

Physical Activity in Pediatric Inflammatory Bowel Disease: A Scoping Review.

BACKGROUND: Inflammatory bowel disease (IBD) is a chronic, systemic condition affecting the gastrointestinal tract. IBD can be severe and are associated with impairment in growth, school absences, abdominal pain, and fatigue. Physical activity (PA) could have an anti-inflammatory effect in addition to other benefits. It is important to address the possible risks, physiological effects of PA, and potential barriers, and facilitators for PA participation in pediatric IBD. However, potential barriers and facilitators to PA have yet to be adequately described. METHODS: We conducted a scoping review to map and describe the current literature on PA in pediatric IBD populations between 1980 and April 2022 using Preferred Reporting Items for Systematic Reviews and Meta-analysis guidelines for Scoping reviews. RESULTS: Nineteen articles were identified including 10 descriptive, 6 interventional, and 3 physiological responses to PA studies. Patients and healthy controls demonstrated similar responses to exercise. Barriers to participation were low self-esteem, body image, and active IBD symptoms. Facilitators included personal interest, activity with friends, and support from family. CONCLUSION: This review highlighted that PA participation may reduce in children with IBD-related symptoms. Short- and medium-term impacts of PA on immune modulation require further study; it is possible that regular PA does not negatively affect biomarkers of disease activity.

A Pilot Study of Exercise Training for Children and Adolescents With Inflammatory Bowel Disease: An Evaluation of Feasibility, Safety, Satisfaction, and Efficacy.

BACKGROUND: Children with inflammatory bowel disease (IBD) experience extraintestinal side effects including altered body composition, impaired muscle strength, and aerobic capacity. Exercise training may remedy these issues. PURPOSE: To assess the feasibility, safety, participant satisfaction, and efficacy of a training program for youth with IBD. METHODS: Children with IBD completed 16 weeks of training (2 supervised + 1 home sessions per week). Feasibility was assessed by tracking recruitment, adherence, and compliance rates. Safety was assessed by tracking symptoms and adverse events. Posttraining interviews gauged satisfaction. Circulating inflammatory markers, body composition, muscle strength, aerobic fitness, and habitual physical activity were measured at baseline, midtraining (8 wk), and posttraining. RESULTS: Eleven youth were recruited and 10 completed the study. Participants adhered to 28 (1) of 32 prescribed supervised sessions and 8 (4) of 16 prescribed home sessions. There were no adverse events, and overall feedback on training was positive. Posttraining, we observed an increase in lean mass (+2.4 [1.1] kg), bone density (+0.0124 [0.015] g·cm-2), aerobic fitness (+2.8 [5.7] mL·kg LM-1· min-1), and vigorous physical activity levels (+13.09 [8.95] min·h-1) but no change in inflammation or muscle strength. CONCLUSION: Supervised exercise training is feasible, safe, and effective for youth with IBD and should be encouraged.

Prevalence and Correlates of Physical-mental Multimorbidity in Outpatient Children From a Pediatric Hospital in Canada.

OBJECTIVE: The aim of this study was to estimate the six-month prevalence of mental illness in children with chronic physical illness (multimorbidity), examine agreement between parent and child reports of multimorbidity, and identify factors associated with child multimorbidity. METHOD: The sample included 263 children aged 2-16 years with a physician-diagnosed chronic physical illness recruited from the outpatient clinics at a pediatric hospital. Children were categorized by physical illness according to the International Statistical Classification of Diseases and Related Health Problems (ICD)-10. Parent and child-reported six-month mental illness was based on the Mini International Neuropsychiatric Interview for Children and Adolescents (MINI-KID). RESULTS: Overall, 101 (38%) of children had a parent-reported mental illness; 29 (25%) children self-reported mental illness. There were no differences in prevalence across ICD-10 classifications. Parent-child agreement on the MINI-KID was low (κ = 0.18), ranging from κ = 0.24 for specific phobia to κ = 0.03 for attention-deficit hyperactivity. From logistic regression modeling (odds ratio [OR] and 95% confidence interval), factors associated with multimorbidity were: child age (OR = 1.16 [1.04, 1.31]), male (OR = 3.76 [1.54, 9.22]), ≥$90,000 household income (OR = 2.57 [1.08, 6.22]), parental symptoms of depression (OR = 1.09 [1.03, 1.14]), and child disability (OR = 1.21 [1.13, 1.30]). Similar results were obtained when modeling number of mental illnesses. CONCLUSIONS: Findings suggest that six-month multimorbidity is common and similar across different physical illnesses. Level of disability is a robust, potentially modifiable correlate of multimorbidity that can be assessed routinely by health professionals in the pediatric setting to initiate early mental health intervention to reduce the incidence of multimorbidity in children.

Change in pre- and in-service early childhood educators' knowledge, self-efficacy, and intentions following an e-learning course in physical activity and sedentary behaviour: a pilot study.

BACKGROUND: Early childhood educators (ECEs) are the primary daytime role models for many young children, and are responsible for facilitating physical activity (PA) opportunities and minimizing sedentary behaviour (SB) in childcare. However, they have reportedly received little related education in their pre-service training. The purpose of the Training pre-service EArly CHildhood educators in physical activity (TEACH) pilot study was to explore changes in pre- and in-service ECEs' knowledge, self-efficacy, behavioural intention, and perceived behavioural control following the TEACH e-Learning course in PA and SB. METHODS: Pre-service ECEs were purposefully recruited from three Canadian colleges, while in-service ECEs were recruited via social media. A pre-post study design was used. ECEs completed two online surveys; one prior to, and one immediately following the completion of the TEACH e-Learning course (~ 5 h). Descriptive statistics were reported, and McNemar Chi-Square tests and paired samples t-tests were used to examine changes in ECEs' question-specific, and total knowledge scores, respectively. Wilcoxon Signed Ranks tests were employed to examine changes in self-efficacy, behavioural intention, and perceived behavioural control. RESULTS: Both pre- (n = 32) and in-service (n = 121) ECEs significantly increased their total knowledge scores from pre- to post-course completion (p < .05*). Significant positive changes in self-efficacy (p < .025*), behavioural intention (p < .007*), and perceived behavioural control (p < .007*) were demonstrated by in-service ECEs following course completion, while only select composite scores within these tools were significant among pre-service ECEs. CONCLUSIONS: These findings provide preliminary evidence of the potential efficacy of the e-Learning course at improving ECEs' knowledge, self-efficacy, behavioural intention, and perceived behavioural control to support PA and minimize SB in childcare. Following the success of the pilot study, testing the effectiveness of the TEACH e-Learning course on a larger scale, with a comparison group, is warranted prior to recommending broader dissemination of the training in pre-service ECE programs and for in-service ECE professional learning.

Association between childcare movement behaviour compositions with health and development among preschoolers: Finding the optimal combinations of physical activities and sedentary time.

Little is known about how wake-time movement behaviour compositions while in childcare relate to children's health and development. This study aimed to use compositional analysis to examine how childcare movement behaviour compositions were associated with standardised body mass index (zBMI) and physical and psychosocial functioning among children in the preschool setting. A total of 405 preschoolers wore accelerometers during childcare hours to measure their moderate-to-vigorous physical activity (MVPA), light intensity physical activity (LPA) and sedentary time. Compositional regression, isotemporal substitution models, and the "Goldilocks" approach was used to examine how wake-time childcare movement behaviour compositions related to each of the outcomes. Engaging in greater LPA relative to MVPA and sedentary time was associated with higher BMI z-scores, replacing sedentary time or time spent in MVPA with LPA was associated with greater physical functioning, and spending more time in sedentary behaviours relative to overall physical activity was related with greater psychosocial functioning. It is not clear what the optimal wake-time movement behaviour composition while in childcare is for health and development; however, LPA and sedentary time while in childcare may have some benefits. More research is needed to aid the development of childcare-specific guidelines for physical activity and sedentary behaviours.

Effects of Comorbid Developmental Coordination Disorder and Symptoms of Attention Deficit Hyperactivity Disorder on Physical Activity in Children Aged 4-5 Years.

Developmental coordination disorder (DCD) is often comorbid with attention-deficit/hyperactivity disorder (ADHD). While children with DCD engage in less moderate-to-vigorous physical activity (MVPA) compared to typically developing (TD) children, research pertaining to how ADHD affects this relationship is limited. We investigated the effect of ADHD on MVPA among children at risk for DCD (DCDr). 507 children aged 4-5 years (DCDr = 233, TD = 274) participated. Motor skills were assessed using the Movement Assessment Battery for Children-2nd edition (DCDr; ≤ 16th percentile), ADHD symptoms were assessed using the Child Behaviour Checklist, and Actigraph accelerometers measured MVPA over seven days. DCD did not negatively affect MVPA, however, after adjusting for ADHD symptoms, the effect of DCD became significant and was driven by symptoms of inattention. Symptoms of ADHD may be suppressing the negative effects of DCD on MVPA, highlighting the importance of assessing and controlling for ADHD symptoms in this population.

Exercise Trials in Pediatric Brain Tumor: A Systematic Review of Randomized Studies.

In pediatric brain tumor patients, treatment advances have increased survival rates to nearly 70%, while consequently shifting the burden of disease to long-term management. Exercise has demonstrated potential in improving multiple health impairments secondary to brain tumor treatment. However, these effects have not been consolidated through review. Therefore, we performed a systematic review of 6 health sciences databases (Medline, Embase, PsychINFO, CINAHL, SPORTDiscus, and Cochrane Central Database). Two reviewers screened studies against predefined inclusion criteria, namely that the study must: (i) be pediatric-specific; (ii) examine the effects of an exercise intervention; and (iii) employ a randomized or quasi-randomized trial design. The same 2 reviewers performed data extraction and analyses. From a pool of 4442, 5 articles-based on 2 independent trials-were included in our review (N=41). Exercise interventions were primarily aerobic, but included balance or muscle building components. Exercise had a positive effect on volumetric or diffusion-based neuroimaging outcomes, as well as motor performance and cardiorespiratory fitness. The effects of exercise on cognition remains unclear. Exercise did not worsen any of the outcomes studied. This review captures the state of the science, suggesting a potential role for exercise in children treated for brain tumor.

The Effects of Exercise Serum From Prepubertal Girls and Women on In Vitro Myoblast and Osteoblast Proliferation and Differentiation.

PURPOSE: In girls and women, the authors studied the effects of an acute bout of low-impact, moderate-intensity exercise serum on myoblast and osteoblast proliferation in vitro. METHODS: A total of 12 pre/early pubertal girls (8-10 y old) and 12 women (20-30 y old) cycled at 60% VO2max for 1 hour followed by 1-hour recovery. Blood samples were collected at rest, mid-exercise, end of exercise, mid-recovery, and end of recovery. C2C12 myoblasts and MC3T3E1 osteoblasts were incubated with serum from each time point for 1 hour, then monitored for 24 hours (myoblasts) or 36 hours (osteoblasts) to examine proliferation. Cells were also monitored for 6 days (myoblasts) to examine myotube formation and 21 days (osteoblasts) to examine mineralization. RESULTS: Exercise did not affect myoblast or osteoblast proliferation. Girls exhibited lower cell proliferation relative to women at end of exercise (osteoblasts, P = .041; myoblasts, P = .029) and mid-recovery (osteoblasts, P = .010). Mineralization was lower at end of recovery relative to rest (P = .014) in both girls and women. Myotube formation was not affected by exercise or group. CONCLUSION: The systemic environment following one acute bout of low-impact moderate-intensity exercise in girls and women does not elicit osteoblast or myoblast activity in vitro. Differences in myoblast and osteoblast proliferation between girls and women may be influenced by maturation.

Do fit kids have fit parents?

BACKGROUND: Physical fitness is an important indicator of current and future health status. This analysis examines the relationships among child-parent dyads in physical fitness measures. DATA AND METHODS: The analysis is based on biological child-parent dyads from three cycles of the Canadian Health Measures Survey (Cycle 1: 2007 to 2009, Cycle 2: 2009 to 2011, and Cycle 5: 2016 to 2017). Physical fitness components-cardiorespiratory (CRF) (n = 615), muscular strength (n = 1,319) and flexibility (n = 1,295)-were measured at mobile examination centres using standardized fitness tests. Descriptive, correlation and regression analyses were used to examine relationships among child-parent dyads. RESULTS: CRF (R = 0.12), muscular strength (R = 0.23) and flexibility (R = 0.22) measures were weakly correlated among child-parent dyads. Modest increases in the physical fitness levels of children were observed with increases in the fitness rating scores of their parents. According to unadjusted and adjusted regression models, CRF (p< 0.05), muscular strength (p< 0.001) and flexibility (p< 0.001) were positively associated among child-parent dyads. When examined by sex of parent and child, CRF was significantly associated in mother-son dyads only, grip strength was associated in all dyad types except father-son pairings, and flexibility was associated in mother-son and father-son pairings only. DISCUSSION: A significant and positive association was evident in measured physical fitness among parents and children. Some variation in the presence and strength of associations existed according to child and parent sex.

Trends in physical fitness among Canadian adults, 2007 to 2017.

BACKGROUND: The fitness levels of Canadian adults declined substantially between 1981 and the years 2007 to 2009, suggesting a reduction in population health. This paper updates the fitness trends of Canadians aged 20 to 69 years by extending the time period to 2017. DATA AND METHODS: The Canadian Health Measures Survey is a repeated cross-sectional survey that is conducted to produce nationally representative health estimates. Descriptive statistics are presented for fitness measures in 2016 and 2017 by age and sex, and trends in fitness were calculated spanning a period of 10 years (2007 to 2017). The associations between fitness measures and meeting the 2020 Canadian physical activity recommendations were also assessed. RESULTS: From 2007 to 2017, there were few statistically significant changes in the fitness levels of Canadian adults. When all ages were combined, there were declining trends in predicted cardiorespiratory fitness, from 39.5 to 36.7 mL•kg⁻¹â€¢min⁻¹ among men and 34.0 to 32.2 mL•kg⁻¹â€¢min⁻¹ among women. Trends indicated declining flexibility among men. In general, meeting the current Canadian moderate-to-vigorous physical activity recommendation was associated with better fitness, particularly in the categories of predicted cardiorespiratory fitness and body composition. INTERPRETATION: The periodic assessment of fitness in Canadians provides valuable insight into population health. The present update provides evidence that fitness levels among adults have generally stabilized over the past 10 years. Taken with the reported declines in fitness that occurred from 1981 to the 2007-to-2009 period, this study shows that the fitness of Canadian adults remained low between 2007 to 2009 and 2016 to 2017. It is necessary to explore new ways to help improve the fitness levels of the Canadian population.

Cognitive and neural effects of exercise following traumatic brain injury: A systematic review of randomized and controlled clinical trials.

Objective: Sub-maximal aerobic exercise can alleviate brain injury-related symptom burden. There is substantial data from animal studies and a growing clinical evidence base to suggest that exercise may also improve cognitive and neural outcomes following brain injury. We performed this systematic review to consolidate evidence from randomized and controlled clinical trials on the effects of exercise on cognitive and neuroimaging outcomes following brain injury in humans.Design: Systematic review.Data sources: MEDLINE, EMBASE, PsychINFO, CINAHL, SPORTDiscus, and Cochrane Central Database.Eligibility criteria for screening studies: Randomized or controlled clinical trials examining the effects of exercise on cognitive and/or neuroimaging outcomes in traumatic brain injury. No restriction was placed on age (or other demographic variables) or severity of injury.Results: Six studies (with an average sample of 42 participants) met eligibility criteria. Three studies used neuroimaging and reported exercise-related improvements as measured by either functional or diffusion-based imaging. The remainder of the trials that employed cognitive outcomes reported largely null findings.Summary/Conclusion: This review demonstrates that exercise shows promise (primarily with respect to neuroimaging outcomes) as a brain injury intervention. While the field is young and heterogeneity between studies precludes meta-analysis, this review raises important questions that need to be addressed by future trials.

The Systemic Effects of Exercise on Regulators of Muscle and Bone in Girls and Women.

PURPOSE: To assess the systemic effects of an acute bout of moderate-intensity exercise on factors that are known to regulate muscle and bone growth in prepubertal girls and women. METHODS: A total of 12 prepubertal girls (8-10 y) and 12 women (20-30 y) cycled at 60% maximal oxygen uptake for 1 hour followed by 1 hour recovery. Blood samples were collected at rest, mid-exercise, end of exercise, mid-recovery, and end of recovery. Plasma was analyzed for interleukin-6, chemokine ligand 1, fibroblast growth factor-2, total insulin growth factor-1 (IGF-1), and free IGF-1 using enzyme-linked immunosorbent assays assays. RESULTS: Both groups had similar concentrations of systemic factors at baseline with the exception of free IGF-1, which was higher in girls (P = .001). Interleukin-6 response was lower in girls versus women (P = .04), with a difference of +105.1% at end of exercise (P < .001), +113.5% at mid-recovery (P = .001), and +93.2% at end of recovery (P = .02). Girls and women exhibited significant declines in chemokine ligand 1, fibroblast growth factor-2, and total IGF-1 during recovery. CONCLUSION: Compared with women, an acute bout of moderate-intensity exercise in girls elicits a lower inflammatory response, suggesting that other mechanisms may be more important for driving the anabolic effects of exercise on muscle and bone in girls.

Sport activities and exercise as part of routine cancer care in children and adolescents.

The burden of morbidities affecting cardiovascular and musculoskeletal systems, metabolism, and psychosocial health in young patients with cancer is high. It is alarming that patients and survivors of childhood cancer are less physically active than their healthy peers, since exercise may improve many of these conditions significantly and is associated with reduction in all-cause mortality in the general population. Systematic integration of exercise programing into cancer care remains an exception, above all in children. Pediatric oncologists may contribute to a culture shift towards educating patients and stakeholders on the benefit of exercise and sports for children and adolescents with cancer.

Can behavioral strategies increase physical activity and influence depressive symptoms and quality of life among children with epilepsy? Results of a randomized controlled trial.

PURPOSE: This study examined whether increasing physical activity (PA) through 6 months of behavioral counseling positively influenced depressive symptoms and quality of life (QoL) over 12 months among children with epilepsy (CWE). METHODS: A longitudinal multisite randomized controlled trial (RCT) was conducted with 8-14-year-old children with active epilepsy. Participants wore a pedometer to track daily PA and completed 3 measures at 4 time points to examine depressive symptoms and QoL. Stratified by site and activity level, participants were randomized to an intervention or control group. The 6-month intervention included 11 behavioral counseling sessions targeting self-regulation of PA. To assess the associations among PA, depression scores, and QoL, primary analysis involved mixed-effects models. RESULTS: We recruited 122 CWE, of whom 115 were randomized (Mage = 11 ±â€¯2; 50% female) and included in the analysis. The intervention did not increase PA in the treatment compared with the control group. No differences were found between groups over time during the subsequent 6 months, where PA decreased among all participants. Results did not show differences between the groups and over time for measures of depressive symptoms and QoL. SIGNIFICANCE: The intervention did not improve or sustain PA levels over 12 months. Both groups demonstrated declines in PA over one year, but there were no changes in depression scores or QoL. As most participants were already nearly reaching the Canadian average of step counts of children their age, with a baseline daily step count of over 9000, there may be a challenge for further increasing PA over a longer period.

Physical activity in young children at risk for developmental coordination disorder.

AIM: To examine cross-sectional differences in patterns of daily physical activity accumulation between preschool children at risk for developmental coordination disorder (DCD) compared to typically developing children. METHOD: In total, 514 children (292 males, 222 females; 4-5y) were recruited as part of the Coordination and Activity Tracking in CHildren (CATCH) study. Motor competence was assessed using the Movement Assessment Battery for Children, Second Edition; children scoring ≤5th centile comprised the probable DCD group (pDCD, n=87), between the 6th and 16th centile were considered to be at risk for DCD (rDCD, n=149), and >16th centile were considered typically developing (n=278). Seven-day physical activity was measured using hip-worn accelerometers. Average daily intensity of activity, frequency, and duration of moderate-to-vigorous physical activity (MVPA) bouts, and triaxial activity counts per minute were determined. RESULTS: No differences in daily activity in any intensity or axis of movement were found among the three groups. However, young children with pDCD accumulated their MVPA in slightly shorter bouts compared to typically developing children. INTERPRETATION: Young children at risk for DCD are not yet in an activity deficit. This may be because of the low motor skill demands of play in this age group. Early motor interventions may be able to promote continued physical activity participation in children with DCD. WHAT THIS PAPER ADDS: Preschool children at risk for developmental coordination disorder (DCD) are not less active than their peers. Overall intensity and frequency of daily activity bouts are similar among motor groups. Children with probable DCD accumulate their activity in shorter bouts.

ACTIVIDAD FÍSICA EN NIÑOS PEQUEÑOS CON RIESGO DE TRASTORNO DEL DESARROLLO DE LA COORDINACIÓN: OBJETIVO: Examinar por medio de un corte transversal las diferencias en los patrones de actividad física entre los niños en edad preescolar con riesgo de trastorno del desarrollo de la coordinación (TDC) en comparación con niños con un desarrollo típico MÉTODO: En total, se reclutaron 514 niños (292 varones, 222 mujeres; de 4 y 5 años) como parte del estudio Coordinación y Seguimiento de Actividad en niños (CATCH). Las capacidades motrices se evaluaron utilizando el test MABC 2 (Movement Assessment Battery for Children). Los niños con puntaje ≤5 percentilo formaron el grupo con TDC probable (pTDC, n = 87), entre percentilos 6 y 16 se consideraron en riesgo de TDC (rTDC, n = 149), y > percentilo 16 se consideraron con desarrollo típico (o normal, n = 278). La actividad física a lo largo de siete días se midió utilizando acelerómetros portados en la cadera. Se determinó la intensidad diaria promedio de la actividad, la frecuencia y la duración de los momentos de actividad física moderada a intensa (MVPA), y los recuentos de actividad triaxial por minuto. RESULTADOS: No se encontraron diferencias en la actividad diaria en ninguna intensidad o eje de movimiento entre los tres grupos. Sin embargo, los niños pequeños con pTDC desarrollaron su MVPA (actividad física moderada a intensa) en episodios ligeramente más cortos en comparación con los niños con un desarrollo típico. INTERPRETACIÓN: Los niños pequeños en riesgo de TDC aún no presentan un déficit de actividad. Esto puede ser debido a las bajas exigencias motrices del juego en este grupo etario. Las intervenciones motoras tempranas pueden promover la participación en actividades físicas de los niños con TDC.

ATIVIDADE FÍSICA EM CRIANÇAS PEQUENAS COM RISCO DE TRANSTORNO DO DESENVOLVIMENTO DA COORDENAÇÃO: OBJETIVO: Observar as diferenças transversais nos padrões de acumulação de atividade física diária entre crianças na idade pré-escolar com risco de transtorno do desenvolvimento da coordenação (TDC) e crianças de desenvolvimento típico. MÉTODOS: Um total de 512 crianças (292 meninos, 222 meninas; de idade entre 4 e 5 anos) foram recrutadas como parte do estudo Acompanhamento da Coordenação e de Atividades de Crianças (Coordination and Activity Tracking in CHildren - CATCH). As competências motoras foram avaliadas por meio da Bateria de Avaliação do Movimento para Crianças (Movement Assessment Battery for Children - MABC) segunda edição. Crianças com pontuação abaixo do quinto percentil compunham o provável grupo com TDC (pDDC, n=87), entre o percentil 6 e 16 foram consideradas com risco de DDC (rTDC, n=149), e aquelas com pontuação acima do percentil 16 foram consideradas de desenvolvimento típico (n=278). A atividade física ao longo de 7 dias foi mensurada utilizando-se acelerômetros posicionados no quadril. Foram avaliadas a média de intensidade da atividade diária, frequência e duração das atividades físicas moderadas a vigorosas e contagem das atividades triaxiais por minuto. RESULTADOS: Não foram encontradas diferenças entre os três grupos avaliados para intensidade ou eixo de movimento. Entretanto, crianças do grupo pTDC acumularam suas atividades físicas moderadas a vigorosas em blocos ligeiramente mais curtos do que crianças de desenvolvimento típico. INTERPRETAÇÃO: Crianças mais novas com risco de TDC ainda não apresentam déficits de atividade física. Isso pode ser devido às baixas demandas motoras de brincar nessa faixa etária. Intervenções motoras precoces podem ser capazes de promover participação em atividades físicas continuada em crianças com TDC.

Physical activity and sedentary behaviour in children with spina bifida.

AIM: To describe active and sedentary time in children with spina bifida and to compare their physical activity on weekdays versus weekends. METHOD: In this exploratory cross-sectional study, data from 13 Canadian and 22 Dutch children with spina bifida (14 females, 21 males; mean age 10y 11mo, standard deviation [SD] 3y 6mo, range 5y 6mo-18y; Hoffer classification distribution: community [n=28], household [n=3], non-functional [n=3], and non-ambulator [n=1]) were analysed. Objective measures of physical activity and sedentary behaviour were obtained by using ActiGraph or Actiheart activity monitors. Data for the participants wearing the ActiGraph were compared with age- and sex-matched controls that were developing typically using independent-samples t-tests. Activity data collected on weekdays was compared to those on weekends. RESULTS: ActiGraph data demonstrated children with spina bifida spent more time sedentary (mean [SD] 49.5min/h [5.78]) and less time in moderate to vigorous physical activity (mean [SD] 2.33min/h [1.61]) compared with the typically developing group (mean [SD] 41.0min/h [5.76] and 5.46min/h [2.13], p=0.001 and p<0.001 respectively). For both ActiGraph- and Actiheart-derived data, physical activity and sedentary time were not significantly different between weekdays and weekends. INTERPRETATION: Children with spina bifida have reduced levels of physical activity and increased sedentary behaviour, with no statistical differences seen between weekdays and weekends. Several methodological issues related to activity monitoring warrant consideration when choosing the appropriate method to quantify physical activity and sedentary behaviour. WHAT THIS PAPER ADDS: Reduced levels of physical activity and sedentary time were quantified in children with spina bifida. Objective quantification of physical behaviour in ambulatory and non-ambulatory school-aged children with spina bifida is possible.

ACTIVIDAD FÍSICA Y COMPORTAMIENTO SEDENTARIO EN NIÑOS CON ESPINA BÍFIDA: OBJETIVO: Describir el tiempo activo y sedentario en niños con espina bífida y comparar su actividad física entre semana y fines de semana. MÉTODO: En este estudio exploratorio de corte transversal, datos de 13 niños canadienses y 22 holandeses con espina bífida (14 mujeres, 21 varones; edad media 10 años 11 meses, desviación estándar [DE] 3 años 6 meses, rango 5 años 6 meses - 18 años; se analizaron en base a la distribución basada en la clasificación de Hoffer: comunidad [n = 28], hogar [n = 3], no funcional [n = 3] y no ambulatorios [n = 1]). Se obtuvieron medidas objetivas de actividad física y comportamiento sedentario mediante el uso de monitores de actividad ActiGraph o Actiheart. Los datos de los participantes que usaban el ActiGraph se compararon con los niños con desarrollo típicos como controles, apareados por edad y sexo usando pruebas t de muestras independientes. Los datos de actividad recopilados durante la semana se compararon con los de los fines de semana. RESULTADOS: Los datos de ActiGraph demostraron que los niños con espina bífida pasaron más tiempo sedentarios (media [DE] 49,5min / h [5,78]) y menos tiempo en actividades físicas moderadas a intensas (media [DE] 2,33min / h [1,61]) en comparación con el grupo control (media [DE] 41,0min / h [5,76] y 5,46min / h [2,13], p = 0,001 y p <0,001 respectivamente). Tanto para los datos derivados de ActiGraph como de Actiheart, la actividad física y el tiempo sedentario no fueron significativamente diferentes entre semana y fines de semana. INTERPRETACIÓN: Los niños con espina bífida tienen niveles reducidos de actividad física y un mayor comportamiento sedentario, sin diferencias estadísticas observadas entre semana y fines de semana. Al elegir un método apropiado para cuantificar la actividad física y el comportamiento sedentario se deben considerar varios problemas metodológicos relacionados con el monitoreo de la actividad en esta población.

ATIVIDADE FÍSICA E COMPORTAMENTO SEDENTÁRIO EM CRIANÇAS COM ESPINHA BÍFIDA: OBJETIVO: Descrever o tempo ativo e sedentário de crianças com espinha bífida e comparar sua atividade física durante a semana versus fins de semana. MÉTODO: Neste estudo exploratório transversal, dados de 13 crianças canadenses e 22 crianças holandesas com espinha bífida (14 do sexo feminino, 21 do sexo masculino; médida de idade 10a 11m, desvio padrão [DP] 3a 6m, variação 5a 6m-18a; Distribuição da classificação de Hoffer: comunidade [n=28], domiciliar [n=3], não funcional [n=3], e não ambulatório [n=1]) foram analisados. Medidas objetivas de atividade física e comportamento sedentário foram obtidas por meio de monitores de atividade ActiGraph ou Actiheart. Dados para os participantes que usaram ActiGraph foram comparados com controles pareados por idade e sexo que tinha desenvolvimento típico usando testes t para amostras independentes. Dados de atividade coletados durante a semana foram comparados com os dados de finais de semana. RESULTADOS: Os dados do ActiGraph demonstraram que crianças com espinha bífida passaram mais tempo sedentário (média [DP] 49,5min/h [5,78]) e menos tempo em atividade física vigorosa (média [DP] 2,33min/h [1,61]) comparados com o grupo com desenvolvimento típico (média [DP] 41,0min/h [5,76] e 5,46min/h [2,13], p=0,001 and p<0,001 respectivamente). Para os dados derivados do ActiGraph- e Actiheart, a atividade física e o tempo sedentário não foram significativamente diferentes comparando os dias da semana com os fins de semana. INTERPRETAÇÃO: Crianças com espinha bífida têm níveis reduzidos de atividade física e comportamento sedentário aumentado, sem diferenças estatísticas quando comparados os dias da semana. Várias questões metodológicas relacionadas ao monitoramento de atividades indicam necessidade de refletir quanto à escolha do método apropriado para quantificar a ativiade física e comportamento sedentário.