Living near physical activity facilities linked to smaller waistline, lower BMI and lower body fat percentage

Living further away from a fast food outlet was also weakly associated with a smaller waist and lower BMI, but the authors note that limitations to the data used may have meant this effect is underestimated.

People living within a kilometer of physical activity facilities, such as gyms, swimming pools, and playing fields, have smaller waist circumferences, lower BMI and lower body fat percentages than people who have no nearby exercise facilities, according to an observational study published in The Lancet Public Health journal.

Living further away from a fast food outlet was also weakly associated with a smaller waist and lower BMI, but the authors note that limitations to the data used may have meant this effect is underestimated.

The findings suggest that increasing access to physical activity facilities and reducing access to fast food shops in residential areas may have the potential to reduce obesity, but may be more effective for some groups of people than others.

“Policy makers should consider interventions aimed at tackling unhealthy built environments,” says lead author Kate Mason, London School of Hygiene & Tropical Medicine, UK.

“Around the world, urbanization is recognized as a key driver of obesity, and certain features of neighborhoods are likely to add to this, including a prevalence of fast food outlets and whether we have access to physical activity facilities. These aspects are often unequally distributed and might partly explain persistent social and geographical inequalities in obesity.”

The study included used data from UK Biobank from people aged 40-70 years old from around the UK, and included waist measurements from 401917 people, BMI from 401435 people, and body fat percentages from 395640 people.

The study used data from 2006 to 2010 and assessed whether the number of physical activity facilities near an individual’s home and proximity to fast-food outlets was associated with a person’s waist circumference, BMI, and body fat percentage. The researchers accounted for a person’s demographic, socioeconomic status, and local area characteristics in these associations, and also looked at whether they varied by sex or household income.

Physical activity facilities included indoor and outdoor facilities for sports or leisure activities (such as gyms, swimming pools, and playing fields), but not public parks, or cycling and walking paths.

On average, there was just one physical activity facility within one kilometer of people’s homes, but a third of participants (31.2%) had no facilities within this distance. The average distance to a fast food outlet was 1.1 kilometers, and nearly a fifth of participants (18.5%) lived within 0.5 kilometers of a fast food outlet.

People who had better access to physical activity facilities were less overweight than those who had access to fewer facilities – with those with at least six facilities nearby having a 1.22cm smaller waist circumference, a BMI 0.57 points lower, and a body fat percentage that was 0.81% lower, on average. This effect was stronger among women and people from higher-income backgrounds.

Compared with people living fewer than 0.5 kilometers from a fast food outlet, those living at least 2 kilometers away had 0.26cm smaller waist circumference, and BMI and body fat percentage were also associated with proximity to a fast food outlet. However, this association was mostly among women, who were less overweight the further they lived from a fast food outlet. The authors suggest that this could be because women may spend more time in their local neighborhood, and therefore be exposed to their local fast food outlets more than men.

The authors also note that the association between weight and proximity to fast food outlets is relatively weak, and may be weaker than expected due to some limitations to the data, such as some fast food outlets not being included in the database, some being misclassified as restaurants rather than fast-food outlets, and not being able to take into account whether or not there were also healthy food outlets in people’s neighbourhoods.

The authors note that exposure to physical activity facilities and fast food outlets could be altered by the use of planning regulations and interventions.

The authors also note that the relationship between weight and proximity to these facilities is observational so cannot prove cause and effect. This relationship may also be bidirectional, for example, owners may choose to set up fast food outlets in areas of high demand where people are already unhealthy, or an outlet being set up in an area may result in people becoming less healthy.

In addition, the study only looked at home neighborhood so does not take into account other food and exercise facilities they may be exposed to via their workplace or commuting route.


This article has been posted by a News Hour Correspondent. For queries, please contact through [email protected]
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