Associate Professor Hayley Christian AM

Playful Bytes

Nurturing children's health together: A collaboration between early childhood education and care (ECEC) educators and parents on active play and eating well

Infection Transmission in Early Childhood Education and Care: a mixed methods study to inform future interventions

The COVID-19 pandemic has exposed many uncertainties and incorrect assumptions about respiratory pathogen transmission.

Activated Outside School Hours Care (OSHC)

Healthy Conversations @ Playgroup

PLAYCE@Home - understanding the impact of COVID-19 on children’s physical activity, health & development

BEACHES: Built Environments and Child Health in WalEs and AuStralia

iPLAYCE Study

Family Friendly Environments

Play Active Program – physical activity policy and training for Early Childhood Education and Care

PLAYCE PAWS: The health and developmental benefits of companion animals for young children

PLAYCE 2 School: Moving well for optimal child health and development

How healthy (or unhealthy) is the food environment around Perth schools?

This unique and innovative project will be the first to quantify the local food environment around all government and non-government Perth metropolitan primary and secondary schools.

Effectiveness of childcare centre interventions to increase young children’s physical activity

Amped Up: An Energy Drink Study

The Effects of Interpregnancy Intervals, Family Size & Sociodemographic Factors on Child Development Outcomes at Age 5

This project will investigate the effects of the time interval between pregnancies (interpregnancy interval), family size and other sociodemographic factors on child development outcomes at age five.

Effects of dog ownership on children’s social-emotional development: findings from the PLAYCE cohort study

Dog ownership is common in families with children and could play a role in children's social-emotional development. This study used longitudinal data on dog ownership and changing dog ownership to investigate their effects on young children's social-emotional development.

Pooled Analysis of Physical Activity, Sedentary Behavior, and Sleep among Children from 33 Countries

The prevalence estimates of physical activity, sedentary behavior, and sleep (collectively known as movement behaviors) in 3- and 4-year-old children worldwide remains uncertain.

The Role of Grandparents in Facilitating Children’s Physical Activity

Research suggests there is considerable opportunity to improve children's movement behaviors while they are being cared for by their grandparents. An understanding of the extent to which grandparent practices facilitate children's engagement in physical activity is critical to the development of health interventions targeting grandparent caregivers.

Residential mobility amongst children and young people in Wales: A longitudinal study using linked administrative records

Child poverty remains a major global concern and a child's experience of deprivation is heavily shaped by where they live and the stability of their local neighbourhood. This study examines frequencies and patterns of residential mobility in children and young people at a population level using novel geospatial techniques to assess how often their physical environment changes and to identify geographical variations in social mobility.

Improving physical activity and screen time in Australian Outside School Hours Care: Study protocol

Children's physical activity and screen time behaviours impact their physical health and well-being. In Australia, less than half of children meet daily physical activity recommendations and only one-third meet daily screen time recommendations.

Developmental trends in young children’s device-measured physical activity and sedentary behaviour

Knowledge of developmental trends in meeting age-specific 24-hour movement behaviour guidelines is lacking. This study describes developmental trends in device-measured physical activity and sedentary time over a three-year period among Western Australian children aged two to seven years, including differences between boys and girls.

Population-referenced percentiles for total movement and energetic play at early childhood education and care

Childcare services such as preschools and long day care centres have been identified as a key setting to promote physical activity in early childhood as they provide access to large numbers of children for prolonged periods. Yet, specific standards for the type and amount of physical activity children accumulate whilst attending childcare are lacking. The purpose of this study was to derive population-referenced percentile values for children's total movement and energetic play whilst attending early childhood education and care services.

Preschool children’s physical activity in the home, childcare and neighbourhood environment: A latent profile analysis using device-based measures

Based on the socioecological conceptual model, the physical environment within the home, childcare and neighbourhood domains are key factors that influence preschool children's physical activity; however, the relative importance of each of these domains for preschool children's physical activity is unclear.

Associations between natural blue and green space and preschool children's movement behaviours

Natural outdoor environments provide important settings for children to engage in physical activity. It is unclear if these relationships also exist in preschool aged children. We examined associations between amount and type of neighbourhood vegetation and blue space, proximity to the beach and preschooler's device-measured movement behaviours.

Neighbourhood walkability and body mass index in children: Evidence from the Millennium Cohort Study in Wales

Overweight and obesity in children continues to increase. Yet, the role of active transport, namely walking, in mitigating these trends remains unclear. This study examined the cross-sectional association between walkability and children's Body Mass Index (BMI) and how this varies by socio-economic and lifestyle characteristics.

Barriers and enablers to promoting grandchildren’s physical activity and reducing screen time: a qualitative study with Australian grandparents

With an increasing number of grandparents providing care to their grandchildren, calls have been made for these caregivers to be considered important stakeholders in encouraging children's engagement in health-promoting behaviors, such as physical activity.

Australian children's physical activity and screen time while in grandparental care

The objective of this study was to explore Australian children's engagement in physical activity and screen time while being cared for by their grandparents.

Physical Activity-Related Practices and Psychosocial Factors of Childcare Educators: A Latent Profile Analysis

Limited research investigates early childhood education and care (ECEC) educators' involvement in promoting physical activity. The aim was to identify distinct profiles based on physical activity-related practices and psychosocial factors in ECEC educators and examine how they relate to the amount of time allocated to children's physical activity. A secondary analysis of educator-reported survey data from the Play Active study was undertaken.

A great way to bring up health behaviour topics at playgroup: a qualitative evaluation of the Healthy Conversations @ Playgroup program

The early years is a critical stage to establish optimal nutrition and movement behaviours. Community playgroups are a relaxed environment for parents with a focus on social connection and supporting parents in their role as 'First Teachers'. Playgroups are therefore an opportunistic setting to promote health behaviours in the early years.

Organizational readiness and implementation fidelity of an early childhood education and care-specific physical activity policy intervention: findings from the Play Active trial

Many children do not accumulate sufficient physical activity for good health and development at early childhood education and care (ECEC). This study examined the association between ECEC organizational readiness and implementation fidelity of an ECEC-specific physical activity policy intervention.

Introducing the Cochrane Nutrition & Physical Activity Thematic Group

Improving nutrition and physical activity is a global health priority. Within Cochrane’s new production model, Thematic Groups (TG) with specialist content and review methods expertise have been established. The purpose of TGs is to support the development and dissemination of high-quality evidence syntheses on priority issues.

Interpregnancy interval and adverse birth outcomes: a population-based cohort study of twins

To investigate associations between interpregnancy intervals (IPIs) and adverse birth outcomes in twin pregnancies.

Association between preschooler outdoor play and home yard vegetation as measured by high resolution imagery: Findings from the PLAYCE study

Outdoor play in the home yard is an important source of physical activity for many preschoolers. This study investigated if home yard size and vegetation are related to preschooler outdoor play time.

Longitudinal effects of dog ownership, dog acquisition, and dog loss on children’s movement behaviours: findings from the PLAYCE cohort study

Regular physical activity is important for children's physical and mental health, yet many children do not achieve recommended amounts of physical activity. Dog ownership has been associated with increased physical activity in children, however, there have been no longitudinal studies examining this relationship.

The built environment and child obesity: A review of Australian policies

Child obesity is a serious public health challenge affected by both individual choice and societal and environmental factors. The main modifiable risk factors for child obesity are unhealthy eating and low levels of physical activity, both influenced by aspects of the built environment. 

Neighborhood Places for Preschool Children's Physical Activity: A Mixed-Methods Study Using Global Positioning System, Geographic Information Systems, and Accelerometry Data

This study adds to the current literature by using a novel device-based method to explore where preschool children are physically active outside of home and childcare settings. This study combined accelerometry with geospatial data to explore the influence of the environment on preschool children's physical activity by objectively identifying the locations where preschool children engage in moderate to vigorous physical activity (MVPA) within and outside of their neighborhood.

Adaptations to scale-up an early childhood education and care physical activity intervention for real-world availability — Play Active

Adaptations for scale-up are ubiquitous but are rarely described in detail. Adaptations may be a key reason for the "scale-up penalty" which is when there is a reduction in intervention effect size following scale-up. The Play Active intervention consists of a physical activity policy for early childhood education and care (ECEC) services, with accompanying implementation support strategies.

Movement behavior policies in the early childhood education and care setting: An international scoping review

Meeting 24-h movement behavior guidelines for the early years is associated with better health and development outcomes in young children. Early childhood education and care (ECEC) is a key intervention setting however little is known about the content and implementation of movement behavior polices in this context. To inform policy development this international scoping review examined the prevalence, content, development and implementation of ECEC-specific movement behavior policies.

The moderating role of parent perceptions in relationships between objectively measured neighbourhood environment attributes and pre-schooler's physical activity: Findings from the PLAYCE study

We examined the moderating effects of parent perceptions of the neighbourhood environment on associations between objectively measured neighbourhood environment attributes and physical activity among pre-schoolers. The number of neighbourhood parks was positively associated with pre-schooler energetic play when parents had above average perceptions of access to services.

Play Active physical activity policy intervention and implementation support in early childhood education and care: results from a pragmatic cluster randomised trial

Policy interventions to increase physical activity in early childhood education and care (ECEC) services are effective in increasing physical activity among young children. However, a large proportion of ECEC services do not have nor implement a physical activity policy.

The impact of weather on time allocation to physical activity and sleep of child-parent dyads

Previous studies showed that unfavourable weather conditions discourage physical activity. However, it remains unclear whether unfavourable weather conditions have a differential impact on physical activity in children compared with adults.

Young children's use of blue spaces and the impact on their health, development and environmental awareness: A qualitative study from parents' perspectives

This study examined how families with young children access and use different types of blue spaces and the health and development benefits, and potential negative effects.

Parents' Perceptions of the Neighbourhood Built Environment Are Associated with the Social and Emotional Development of Young Children

The influence of the neighbourhood built environment on young children's physical development has been well-documented; however, there is limited empirical evidence of an association with social and emotional development. Parental perceptions of the neighbourhood built environment may act as facilitators or barriers to young children's play and interactions in their local environment. The aim of this study was to examine the associations between parents' perceptions of the neighbourhood built environment and the social-emotional development of children aged two-to-five years.

Causal Impact of Physical Activity on Child Health and Development

The relationship between physical activity and child health and development is well-documented, yet the extant literature provides limited causal insight into the amount of physical activity considered optimal for improving any given health or developmental outcome.

A mobile health intervention to encourage physical activity in children: a randomised controlled trial

Despite immense benefits of physical activity on health and developmental outcomes, few children achieve recommended daily levels of physical activity. Given more than half of families with children own a dog, we investigated the effect of a mobile health (mHealth) intervention to encourage dog-facilitated physical activity through increased family dog walking and children's active play with their dog.

The community food environment and its association with diet, health or weight status in Australia: A systematic review with recommendations for future research

This study systematically reviewed Australian literature to determine if an association exists between geospatial exposure to food outlets and diet, health or weight status. Recommendations for future research are provided.

How does the school built environment impact students’ bullying behaviour? A scoping review

School bullying is a public health concern affecting the physical and mental health of children and young people. While school-based interventions to prevent bullying have been developed internationally, the effectiveness of many interventions has been mixed and modest.

Built Environments And Child Health in WalEs and AuStralia (BEACHES): a study protocol

Childhood obesity and physical inactivity are two of the most significant modifiable risk factors for the prevention of non-communicable diseases. Yet, a third of children in Wales and Australia are overweight or obese, and only 20% of UK and Australian children are sufficiently active.

Where are preschoolers active in childcare centers? A hot-spot analysis using GIS, GPS and accelerometry data

This study investigated where preschool children were more or less active in outdoor play areas in Early Childhood Education and Care (ECEC) centers using a novel method of combined device-measured physical activity, spatial data and on-site audit data.

Associations between the built environment and emotional, social and physical indicators of early child development across high and low socioeconomic neighbourhoods

Emerging evidence indicates that the built environment influences early child development. Access to, and the quality of, built environment features vary with the socioeconomic status (SES) of neighbourhoods. It has not yet been established whether the association between built environment features and early child development varies by neighbourhood SES.

Educators’ Barriers and Facilitators to Physical Activity Policy Implementation in the Childcare Setting: Qualitative Findings From the Play Active Project

We explored childcare educators’ perceived barriers and facilitators to policy implementation in order to inform the development and implementation of an early childhood education and care (ECEC) specific physical activity policy. This study was part of the Play Active (2019-2023) project which aimed to develop, implement and evaluate evidence-based physical activity policy to improve physical activity levels in children attending ECEC.

Is early childhood development impeded by the birth timing of the younger sibling?

This study investigated whether the timing of birth of the younger siblings was associated with the risk of the older siblings’ developmental vulnerability in early childhood.

Built Environments and Child Health: A Policy Review’, Life Course Centre Working Paper Series, 2021-22

Childhood obesity is one of the most serious public health challenges of the 21st century and is affected not only by individual choice but also by societal and environmental influences. Childhood obesity is higher in children living in regional and remote compared with major cities, in one-parent families and for those with a disability.

The impact of weather on time allocation to physical activity and sleep of child-parent dyads - Life Course Centre Working Paper Series 2021

This study explores the differential impact of weather on time allocation to physical activity and sleep by children and their parents. We use nationally representative data with time use indicators objectively measured on multiple occasions for more than 1,100 child-parent pairs, coupled with daily meteorological data.

A cross-sectional study of factors associated with regular dog walking and intention to walk the dog

Dog walking is important for public health and dog welfare, yet some owners do not walk with their dogs regularly. This study examined factors associated with participation in regular dog walking and intention to dog walk, in order to inform physical activity interventions.

Meeting the Australian 24-Hour Movement Guidelines for the Early Years is associated with better social-emotional development in preschool boys

24-hour Movement Guidelines for the Early Years promote that achieving all three-movement behaviour (sleep, sedentary behaviour and physical activity) recommendations is important for child health and development. We examined the association between meeting all, none and combinations of the Australian 24-Hour Movement Guidelines for the Early Years and social-emotional development in 1363 preschool (2-5 years) boys (52%) and girls.

Prevalence and pattern of energy drink intake among Australian adolescents

Energy drinks (ED) are popular among young people despite evidence of associated health risks. Research into the prevalence and pattern of ED intake among young people is sparse. The present study investigates the prevalence and pattern of ED intake among a large sample of adolescents, including how many consume them, how often, for what reasons and in what contexts.

Energy drink intake is associated with insomnia and decreased daytime functioning in young adult females

To investigate the association between energy drink (ED) use and sleep-related disturbances in a population-based sample of young adults from the Raine Study.

The relationship between dog ownership, dog play, family dog walking, and pre-schooler social-emotional development: findings from the PLAYCE observational study

Regular physical activity provides children with health and developmental benefits. This study investigated if active play and walking with the family dog was associated with better social-emotional development in young children.

Association between preschooler movement behaviours, family dog ownership, dog play and dog walking: Findings from the PLAYCE study

Physical inactivity in childhood is a major public health issue. Dog ownership has been widely reported to lead to greater physical activity in adults and school-aged children. We examined if dog ownership and dog-facilitated physical activity were associated with higher physical activity in preschoolers. Secondary analysis of the 'Play Spaces & Environments for Children's Physical Activity' (PLAYCE, 2015-2018) study involving 1366, 2-5-year-olds from 122 long day-care centres in Perth, Australia was conducted.

Individual, Social, and Environmental Correlates of Energy Drink Use Among Adolescents

To investigate the correlates of adolescent energy drink use using a socioecological approach to inform future interventions.

Evaluating the effectiveness of the Play Active policy intervention and implementation support in early childhood education and care: a pragmatic cluster randomised trial protocol

Daily physical activity is critical during the early years of life for facilitating children's health and development. A large proportion of preschool children do not achieve the recommended 3 h of daily physical activity. Early childhood education and care (ECEC) services are a key setting to intervene to increase physical activity. There is a significant need for ECEC specific physical activity policy, including clearer guidelines on the amount of physical activity children should do during care, and strategies for implementation of these guidelines.

Interventions to Improve Child Physical Activity in the Early Childhood Education and Care Setting: An Umbrella Review

Early childhood education and care (ECEC) services are a key setting to support improvements in the physical activity of young children. This umbrella review gathered and synthesised systematic review evidence of the effectiveness of interventions in the ECEC setting on the physical activity levels of children aged 0–6.

Is vegetation cover in key behaviour settings important for early childhood socioemotional function? A preregistered, cross-sectional study

The environmental influences on early childhood development are understudied. The association between vegetation cover (i.e., trees, shrubs, grassed areas) in four key behaviour settings and socioemotional functioning was investigated in 1196 young children (2–5 years).

Active transport research priorities for Australia

To advance active transport, robust policy-relevant evidence is needed to understand how to change behaviour and to support decision-making by policy makers and practitioners. Currently, however, priority research questions that are most critical for advancing active transport have not been identified.

The relationship between physical activity, self-regulation and cognitive school readiness in preschool children

Limited research exists on the pathways through which physical activity influences cognitive development in the early years. This study examined the direct and indirect relationships between physical activity, self-regulation, and cognitive school readiness in preschool children.

Study protocol for Healthy Conversations @ Playgroup: a multi-site cluster randomized controlled trial of an intervention to promote healthy lifestyle behaviours in young children attending community playgroups

Early childhood is a critical window for preventing obesity and chronic disease. Yet, 1 in 4 Australian children aged 5 years and under are affected by overweight or obesity; and significant proportions of children under 5 years fail to meet guidelines for diet quality, physical activity (PA), screen time, and sleep.

Gestational age and child development at school entry

Studies have reported a dose-dependent relationship between gestational age and poorer school readiness. The study objective was to quantify the risk of developmental vulnerability for children at school entry, associated with gestational age at birth and to understand the impact of sociodemographic and other modifiable risk factors on these relationships. Linkage of population-level birth registration, hospital, and perinatal datasets to the Australian Early Development Census (AEDC), enabled follow-up of a cohort of 64,810 singleton children, from birth to school entry in either 2009, 2012, or 2015.

The association between preschooler physical activity duration and intensity and social emotional development: Findings from the PLAYCE study

Social emotional development is imperative to young children's long-term psychological and physical health. Physical activity (PA) may be important for young children's social emotional development. The association between preschooler PA duration and intensity and social emotional development was investigated.

Longitudinal evidence of the impact of dog ownership and dog walking on mental health

Emerging evidence supports the physical health and social benefits of dog ownership. This study examined the longitudinal effect of dog ownership and dog walking on mental health.

Exposomes and metabolic health through a physical activity lens: a narrative review

In this narrative review, we provide an overview of the role of physical activity as part of differing exposomes (our combined non-genetic exposures from conception onwards) and environmental influences on metabolic health. We discuss 'beneficial' exposomes (green/natural outdoor spaces, sun exposure, healthy diets and features of built environments) that could synergise with physical activity to prevent metabolic dysfunction, particularly that related to lifestyle diseases of obesity, type 2 diabetes and metabolic syndrome.

Barriers and motivators for preschoolers playing and walking with their dog: Results from qualitative research

A large proportion of preschoolers do not meet the recommended three hours of daily physical activity. A potential source of daily physical activity could be that provided via the family dog. This qualitative study aimed to explore the barriers and motivators to preschoolers playing with their dog and participating in family dog walks.

Impact of covid-19 restrictions on western Australian children’s physical activity and screen time

Physical activity is essential for children’s healthy development, yet COVID-19 physical distancing restrictions such as school closures and staying at home, playground closures, and the cancelling of organised community sport have dramatically altered children’s opportunities to be physically active. This study describes changes in levels of physical activity and screen time from February 2020 (i.e., before COVID-19 restrictions were introduced in Western Australia) to May 2020 (i.e., when COVID-19 restrictions were in place). Parents of children aged 5 to 9 years from Western Australia were eligible to participate and recruited through convenience sampling.

A study protocol for a randomised controlled trial to evaluate the effectiveness of a dog-facilitated physical activity minimal intervention on young children's physical activity, health and development: the PLAYCE PAWS trial

Pet ownership brings many health benefits to individuals. In children developmental benefits can extend to improved self-esteem, better social competence and decreased loneliness. The majority of households with children own a dog, however only a small proportion of children gain the benefits of dog ownership through dog walking and play. There are few intervention studies investigating the impact of dog-facilitated physical activity in children. The PLAYCE PAWS study aims to test a minimal-contact intervention through the use of mobile health ("mhealth") strategies, i.e. text (SMS) messages, to parents to encourage their children to walk and play with their dog more, and evaluate the impact on children's overall physical activity and development.

Consumption of energy drinks is associated with depression, anxiety, and stress in young adult males: Evidence from a longitudinal cohort study

Energy drinks (EDs) claim to boost mental performance, however, few studies have examined the prospective effects of EDs on mental health. This study examined longitudinal associations between ED use and mental health symptoms in young adults aged 20 years over a 2-year period.

Understanding obesity among companion dogs: New measures of owner's beliefs and behaviour and associations with body condition scores

The findings provide a method for assessing a wide range of factors that may be associated with obesity among companion dogs

Pets Are Associated with Fewer Peer Problems and Emotional Symptoms, and Better Prosocial Behavior: Findings from the Longitudinal Study of Australian Children

Pets may protect children from developing social-emotional problems and should be taken into account when assessing child development and school readiness

The influence of the early childhood education and care environment on young children’s physical activity

The PLAYCE Study instruments provide reliable measures of early childhood education and care physical activity environments

Children's neighbourhood physical environment and early development: an individual child level linked data study

The neighbourhood physical environment has a weak but significant association with early childhood development

Living liveable? RESIDE's evaluation of the “Liveable Neighborhoods” planning policy on the health supportive behaviors and wellbeing of residents in Perth

New suburban communities built in accordance with the “Liveable Neighbourhoods” policy have the potential to encourage health supportive behaviors

Feasibility of conducting an early pregnancy diet and lifestyle e-health intervention: The Pregnancy Lifestyle Activity Nutrition (PLAN) project

A lifestyle intervention starting in the first-trimester pregnancy utilising e-health mode of delivery is feasible

The effect of upgrades to childcare outdoor spaces on preschoolers’ physical activity: Findings from a natural experiment

This natural experiment investigated the influence of early childhood education and care outdoor physical environment upgrade on preschoolers' physical activity

Nature play and fundamental movement skills training programs improve childcare educator supportive physical activity behavior

Both the Nature play and fundamental movement skills professional development programs were effective in improving educators’ self-efficacy to engage children

Exploring stakeholders' perceptions of the acceptability, usability, and dissemination of the australian 24-hour movement guidelines for the early years

This study examined stakeholders' perceptions regarding the acceptability, usability, and dissemination of the Australian 24-Hour Movement Guidelines

Shade coverage, ultraviolet radiation and children’s physical activity in early childhood education and care

The provision of shade, particularly through natural forms such as tree canopy, is an important sun protection strategy and enabler of outdoor time