2023 Volume 31 Issue 3 Pages 127-141
Objective: Clarify the measurement circumstances of wet bulb globe temperature (WBGT) in elementary and junior high schools, how these measurements help prevent heatstroke, and the advantages and problems associated with using WBGT.
Methods: We conducted a cross-sectional questionnaire study by surveying randomly selected elementary and junior high school health coordinator in the Kanto region’s Prefecture A. We analyzed data from 65 elementary and 64 junior high schools. We conducted a cross-tabulation of WBGT measurement conditions and locations according to school type. Examples of measures according to WBGT, and the advantages and disadvantages of using WBGT, which were the free-description items, were categorized after examining their meaning.
Results: WBGT was measured in approximately 90% of both elementary and junior high schools. Many measurements were taken in schoolyards/grounds, and gymnasiums; a few were taken in classrooms and pools. Overall, 81.5% of elementary schools and 64.1% of junior high schools implemented measures according to WBGT. At temperatures of 21°C or higher, students were instructed to rehydrate and rest. Measures diversified with increasing WBGT; at temperatures of 31°C or higher, many schools suspended outdoor exercise or activities. WBGT’s advantages included that it facilitated appropriate judgment for heatstroke prevention awareness while the disadvantages included that the planned implementation of educational activities may be hindered by measures taken according to the WBGT.
Conclusion: WBGT was measured and used in many elementary and junior high schools. However, there were some issues in its use, such as the planned implementation and adjustment of educational activities.
