Effects of physical activity and shade on the heat balance and thermal perceptions of children in a playground microclimate

Jennifer K. Vanos, Alexandria J. Herdt, Marc R. Lochbaum

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Outdoor thermal comfort (TC) is an important parameter in assessing the value and health utility of a recreational space. Given the public health significance of child heat illness, the ability to model children's heat balance and TC during activity has received little attention. The current pilot study tests the performance of an outdoor human heat balance model on children playing in warm/hot outdoor environments in sun and shade. Fourteen children aged 9–13 participated in the 8-day study in Texas in spring 2016, performing physical activity while wearing heartrate monitors and completing thermal perception surveys (e.g., actual thermal sensation (ATS)). Surveys were compared to predicted thermal sensation (PTS) based on principles of human-environment heat exchange using personal data and a suite of on-site microclimate information. Results demonstrate the model to significantly predict ATS votes (Spearman's rho = 0.504). Subjective preferred change was also significantly correlated to modeled PTS (rho = −0.607). Radiation, air temperature, windspeed, and level of tiredness were significant predictors of ATS. Finally, the mean human energy balance was significantly lower in the shade (−168 W m-2), thus lowering heat stress potential, with the model predicting ATS with little-to-no error (0.2 and 0.0 scale error units in sun and shade, respectively). This study demonstrates an ability to estimate a child's heat balance while accounting for changes in major heat contributors (e.g., radiation, metabolism), and is the first study to evaluate TC of children during activity in outdoor built environments. New insights of heat perception may aid in recognition of often under-recognized heat stress.

Original languageEnglish (US)
Pages (from-to)119-131
Number of pages13
JournalBuilding and Environment
Volume126
DOIs
StatePublished - Dec 2017
Externally publishedYes

Fingerprint

playground
physical activity
heat balance
microclimate
heat
Thermal comfort
energy balance
effect
Hot Temperature
public health
personal data
air temperature
metabolism
ability
Sun
voter
illness
air
Radiation
Data privacy

Keywords

  • Bioclimatic design
  • Children
  • Heat stress
  • Physical activity
  • Radiation
  • Thermal comfort

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Building and Construction

Cite this

Effects of physical activity and shade on the heat balance and thermal perceptions of children in a playground microclimate. / Vanos, Jennifer K.; Herdt, Alexandria J.; Lochbaum, Marc R.

In: Building and Environment, Vol. 126, 12.2017, p. 119-131.

Research output: Contribution to journalArticle

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