Why popular children are top of the class when it comes to exercise
Each additional friend was linked to 10 minutes of extra activity at weekends



10:21 GMT, 7 May 2012

Social butterflies at school are more physically active than their less popular classmates, according to a new study.

Researchers from the University of Bristol found a child spent an extra 10 minutes being active at the weekend for each additional friend they had.

They say the discovery is good news for childhood health as the majority of young people do not meet physical activity guidelines and activity levels tend to decline through childhood.

Girls were more likely than boys to keep activity levels up after leaving primary school. Researchers said they were more likely to hold onto their old friends

Girls were more likely than boys to keep activity levels up after leaving primary school. Researchers said they were more likely to hold onto their old friends

The researchers, who are studying children’s physical activity in the transitional years between primary and secondary school, also found an extra friend was associated with almost four additional minutes of moderate to vigorous physical activity (MVPA) after school.

However, the link was only noticed in girls, not boys, suggesting stronger friendship associations for girls than boys.

Dr Russell Jago, of the University of Bristol’s Centre for Exercise, Nutrition and Health Sciences, said: “The research shows that children are receptive to being encouraged to undertake more physical activity.

'We want to encourage young people to be active with their friends and support each other.

'This information can be used to design strategies to improve activity levels among children at a crucial stage in their development.'

He added: 'The higher levels of physical activity associated with girls having more friends and having friends who support physical activity suggests promoting activity with friends could be helpful.'

The researchers studied data from the Personal and Environmental Associations with Children’s Health (PEACH) that recruited Year 6 pupils (aged 10 to 11) from 23 primary schools in Bristol.

They were reassessed when they went to one of eight secondary schools in the city. Physical activity was measured with accelerometers worn over seven days and friends were assessed through questionnaires.

While at primary school, boys engaged in around 26 minutes of MVPA after school with girls engaging in 21 minutes – a significant proportion of children’s recommended 60 minutes of physical activity a day. At the weekend, boys and girls engaged in 45 minutes and 36 minutes of MVPA a day respectively.

There was a 16 per cent decline in boys’ after-school MVPA in their first year of secondary school, compared with the primary school values.

Girls’ after-school MVPA fell by around 12 per cent. Weekend MVPA for both sexes increased, possibly due to decreased adult outdoors supervision. The reasons for the decline in after-school activity are less clear.

The findings of the research, funded by World Cancer Research Fund (WCRF) and the National Prevention Research Initiative (NPRI), were published in the journal Medicine and Science in Sports and Exercise.

The report noted: 'Analysis indicated that an increase in the number of friends between primary and secondary school was associated with increased after-school and weekend MVPA.'

It concluded: 'Increased number of friends and friend support for physical activity was associated with increases in girls’ MVPA after the move to secondary school.

'Strategies to foster friend support for physical activity may be important for helping girls be active.'

Dr Rachel Thompson, Deputy Head of Science at WCRF, said: 'Physical activity is an important factor in reducing cancer risk in later life and it is vital that being physically active is a habit we develop early.

'This study shows physical activity at below recommended levels for primary school children, with a further drop in after-school activity after the move to secondary school which is particularly concerning.

'It suggests this transition period is critical for improving physical activity levels among children and understanding factors such as the influence of friends is essential.'