ReviewAssociations of children's independent mobility and active travel with physical activity, sedentary behaviour and weight status: A systematic review
Introduction
In developed countries, children's active travel such as walking and bicycling to school and leisure-related destinations has declined dramatically during the last three decades. Simultaneously, children's commuting by car has increased.1, 2, 3, 4 For example, US data showed that between 1969 and 2001 children's active commuting to school decreased from 41% to 13%, whilst driving to school by car increased from 17% to 55%.4 Active travel without adult accompaniment corresponds to the concept of children's independent mobility which is defined as the freedom of those aged under 18 years to move around in public spaces without adult supervision.5 Independent mobility comprises various unsupervised activities relating to active travel with the purpose of getting to places and play outside the home.6, 7 In 1990, a UK study showed that only 9% of children aged 7–8 years were allowed to travel to school on their own, whereas in 1971 this proportion was 80%.5 Similar declines in independent mobility have been observed in other countries such as the US, Denmark, Finland, Norway and the Netherlands.3, 8, 9 Reasons for the declines in independent mobility and active travel include parental concerns about road safety and stranger danger, inconvenience with families’ daily schedules, and longer commute distances because of increasing urban sprawl.10, 11, 12, 13
The decrease in independent mobility and active travel is concerning since both can contribute towards attaining the recommended daily 60 min of moderate-to-vigorous physical activity and maintaining a healthy weight in children.7, 14, 15 In particular, children who do not attain sufficient physical activity through organized sport may benefit from engaging in active travel and independent mobility.14 Moreover, the independent mobility can provide psychosocial benefits for children in the form of social interactions and connectedness with friends and other people in the neighbourhood.16 Some reviews17, 18, 19, 20 have shown a positive association of active travel to and/or from school with children's overall physical activity, whereas findings in relation to healthy weight appear less robust.17, 19, 20, 21, 22 However, none of these reviews have sought to establish how sedentary behaviour may be associated with active travel. Sedentary behaviour is an emerging independent health risk factor for children's metabolic health, and a behaviour that increases with motorized travel.23, 24 Moreover, previous reviews primarily focused on active travel to school; it remains unknown whether active travel to non-school destinations such as shops, parks, and friend's houses increase children's daily physical activity and reduce the risk of being sedentary and overweight. These are important questions given that the school is only one of several travel destinations for children, and often it is located too far away from home to be considered suitable for active travel.4 Furthermore, children's independent mobility has rarely been examined for its potential to lower the risks of being insufficiently physically active, sedentary and overweight.
This systematic review aims to synthesize the evidence for associations of children's independent mobility and active travel to various destinations with physical activity, sedentary behaviour and weight status. To the authors’ knowledge this is the first systematic review that addresses relationships between independent mobility and active travel to school and non-school destinations with these health factors. Hence, this research builds on previous reviews that have considered relationships solely in regard to active school travel.
Section snippets
Methods
Relevant peer-reviewed, English language literature published between January 1990 and March 2012 was searched across six databases (PubMed, Scopus, CINAHL, SportDiscus, PsychInfo, Transport Research International Documentation). Systematic search strategies were designed using a combination of thesaurus and free terms covering the following terms: child, adolescent, adolescence, youth, kids, independent mobility, active travel, active commuting, active transport, walk, cycle, cycling, physical
Results
A total of 2699 potentially relevant, non-duplicate papers were identified and screened based on title and abstract. Of these, 140 studies were retrieved for detailed review. After exclusion of 88 non-eligible studies, 52 studies were included in this review (Fig. 1 in Supplementary material). General study characteristics are summarized in Table 2; more detailed study characteristics are presented in Table 1 in the Supplementary material. In the majority of studies,31, 32, 33, 34, 35, 36, 37,
Discussion
This systematic review of associations of children's independent mobility and active travel with physical activity, sedentary behaviour and weight status identified 52 relevant studies. Of these, twenty-seven studies23, 32, 34, 35, 36, 37, 38, 39, 40, 41, 44, 47, 49, 52, 53, 54, 55, 58, 62, 67, 68, 69, 70, 72, 73, 74, 75 focused on associations between active school travel and physical activity, and in line with previous reviews17, 19, 20 consistently showed positive associations. Eighty-two
Conclusions
Studies consistently showed that children's active travel to school and other places positively influences their overall levels of physical activity. Emerging evidence on children's independent mobility suggested that children who play outdoors and travel actively without adult supervision accumulate higher levels of physical activity than those who do not. This review revealed important research gaps which require further attention. It remains unknown whether ‘free-range children’ are also
Practical implications
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Children who have the freedom to play outdoors and travel actively without adult supervision accumulate more physical activity than those who do not.
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Children's active travel to school and leisure-related destinations increases their physical activity levels.
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Active travel to leisure-related destinations should be better explored for its preventive effect on sedentary behaviour and overweight.
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Measurement of sedentary activities beyond simply screen-based activities and clarity on appropriate
Acknowledgements
This review was supported through the Australian Research Council (ARC) funded projects Children's Active Travel, Connectedness and Health (CATCH, Discovery Project DP1094495) and Independent Mobility and Active Travel in Children (iMATCH, LP 100100344). The former project includes financial support from the Merri Community Health Services Victoria, the Moreland City Council, Queensland Health and Queensland Transport which is gratefully acknowledged. The CATCH/iMATCH projects are currently
References (97)
- et al.
Trends in Australian children traveling to school 1971–2003: burning petrol or carbohydrates?
Prev Med
(2008) - et al.
Children's active travel and independent mobility in four countries: development, social contributing trends and measures
Transp Policy
(2011) Active transportation to school trends among U.S. schoolchildren, 1969–2001
Am J Prev Med
(2007)- et al.
Personal and environmental factors associated with active commuting to school in Switzerland
Prev Med
(2008) - et al.
Influence of the social environment on children's school travel
Prev Med
(2010) - et al.
Children's independent mobility to school, friends and leisure activities
J Transp Geogr
(2009) - et al.
Active school transport, physical activity levels and body weight of children and youth: a systematic review
Prev Med
(2009) - et al.
Occupational sitting and health risks: a systematic review
Am J Prev Med
(2010) - et al.
The strengthening the reporting of observational studies in epidemiology (STROBE) statement: guidelines for reporting observational studies
J Clin Epidemiol
(2008) - et al.
Can compliance with non-pharmacological treatments for cardiovascular disease be improved?
Am J Prev Med
(2000)
Neighborhood environment and physical activity among youth: a review
Am J Prev Med
Association between active commuting to school, weight and physical activity status in ethnically diverse adolescents predominately living in deprived communities
Public Health
Mapping the walk to school using accelerometry combined with a global positioning system
Am J Prev Med
Commuting to school: are children who walk more physically active?
Am J Prev Med
Differences in physical activity by gender, weight status and travel mode to school in Cypriot children
Prev Med
The contribution of active travel to children's physical activity levels: cross-sectional results from the ALSPAC study
Prev Med
Is active travel to non-school destinations associated with physical activity in primary school children?
Prev Med
Sustained Active Transportation is associated with a favorable body mass index trajectory across the early school years: findings from the Quebec Longitudinal Study of Child Development birth cohort
Prev Med
Active travel to school BMI and participation in organised and non-organised physical activity among Portuguese adolescents
Prev Med
Physical activity levels of children who walk, cycle, or are driven to school
Am J Prev Med
Park-based physical activity among children and adolescents
Am J Prev Med
Young children in urban areas: links among neighborhood characteristics, weight status, outdoor play, and television watching
Soc Sci Med
The evolution of physical activity recommendations: how much is enough?
Am J Clin Nutr
Physical activity cost of the school run: impact on schoolchildren of being driven to school
Br Med J
Conclusions Chapter 6 One False Move. A study of Children's Independent Mobility
Kids in the city study: research design and methodology
BMC Public Health
Undertsanding Children's Independence Chapter 3 Free Range Kids: Independence and the Urban Child
It all used to be better? Different generations on continuity and change in urban children's daily use of space
Child Geogr
A historical analysis of young people's use of public space, parks and playgrounds in New York City
Child Youth Environ
Associations among individual, social, and environmental barriers and children's walking or cycling to school
Am J Health Promot
Physical Activity, Active Transport and Children's Health Chapter 2 Active Transport: Children and Young People: An Overview of Recent Evidence
Children's lives: a Dunedin study
Child Issue
Children's active commuting to school: current knowledge and future directions
Prev Chronic Dis
Walking and bicycling to school: a review
Am J Lifestyle Med
The relationship between active travel to school and health-related fitness in children and adolescents: a systematic review
Int J Behav Nutr Phys Act
Systematic review of active commuting to school and children's physical activity and weight
J Phys Act Health
Walking and bicycling to school: a review
Am J Lifestyle Med
Correlates of objectively measured physical activity and sedentary behaviour in English children
Eur J Public Health
Physical activity, cardiorespiratory fitness, and the metabolic syndrome in youth
J Appl Physiol
Quality of reporting of observational longitudinal research
Am J Epidemiol
A review of correlates of physical activity of children and adolescents
Med Sci Sports Exerc
Cycling to school and cardiovascular risk factors: a longitudinal study
J Phys Act Health
The association between walking to school, daily step counts and meeting step targets in 5- to 17-year-old Australian children
Pediatr Exerc Sci
Active travel to school and cardiovascular fitness in Danish children and adolescents
Med Sci Sports Exerc
The broader impact of walking to school among adolescents: seven day accelerometry based study
Br Med J
Active transport to school as part of a broader habit of walking and cycling among South Australian youth
Pediatr Exerc Sci
Pedometer-determined physical activity and active transport in girls
Int J Behav Nutr Phys Act
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