School beverage environment and children's energy expenditure associated with physical education class: an agent-based model simulation
Authored by H Xue, H -J Chen, S Kumanyika, Y Wang
Date Published: 2017
DOI: 10.1111/ijpo.12126
Sponsors:
United States National Institutes of Health (NIH)
Platforms:
NetLogo
Model Documentation:
ODD
Flow charts
Model Code URLs:
Model code not found
Abstract
Background: Physical activity contributes to children's energy
expenditure and prevents excess weight gain, but fluid replacement with
sugar-sweetened beverages (SSBs) may diminish this benefit.
Objective: The aim of this study was to explore the net energy
expenditure (EE) after physical education (PE) class given the
competition between water and SSB consumption for rehydration and
explore environmental factors that may influence the net EE, e.g. PE
duration, affordability of SSB and students' SSB preference.
Methods: We built an agent-based model that simulates the behaviour of
13-year-old children in a PE class with nearby water fountains and SSB
vending machines available.
Results: A longer PE class contributed to greater prevalence of
dehydration and required more time for rehydration. The energy cost of a
PE class with activity intensity equivalent to 45 min of jogging is
about 300 kcal on average, i.e. 10-15\% of average 13-year-old
children's total daily EE. Adding an SSB vending machine could offset PE
energy expenditure by as much as 90 kcal per child, which was associated
with PE duration, students' pocket money and SSB preference.
Conclusions: Sugar-sweetened beverage vending machines in school may
offset some of the EE in PE classes. This could be avoided if water is
the only readily available source for children's fluid replacement after
class.
Tags
Agent-based model
Simulation
Obesity
health
Water
Consumption
Adolescents
Drinking
Provision
Trends
Access
Beverages
Rehydration
Middle