- Tytuł:
- Sensitivity and specificity of using exercise heart rate in a thermoneutral environment to predict heat tolerance status
- Autorzy:
-
Northway, Sarah
Jones, Douglas
Buono, Michael - Powiązania:
- https://bibliotekanauki.pl/articles/2203015.pdf
- Data publikacji:
- 2023-05-23
- Wydawca:
- Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
- Tematy:
-
exercise
heat
heart rate
heat intolerance
heat tolerance testing
return to activity - Opis:
- Objectives Following heat illness, a return to activity may require passing a heat tolerance test (HTT). However, there are several logistical limitations to the widespread use of the HTT. Thus, it would be advantageous to develop a test that could be conducted in a thermoneutral (~22°C) environment to predict heat tolerance status. The purpose of the current study was to determine the sensitivity and specificity of using the criteria of a heart rate (HR) ≥130 bpm following 30 min of thermoneutral exercise in detecting heat-intolerant and heat-tolerant individuals. Material and Methods Sixty-five subjects visited the lab on 3 separate days. The first visit consisted of completing a maximal oxygen uptake (VO2 max) test to assess cardiovascular fitness. For lab visits 2 and 3, subjects randomly completed a 2-hour walking treadmill test in either a hot (40°C, 40% relative humidity [RH]) or thermoneutral (22°C, 40% RH) environment. Results Forty-eight subjects were classified as heat-intolerant and seventeen subjects as heat-tolerant. Using the criterion of a HR ≥130 bpm at 30 min of exercise in the thermoneutral environment, specificity (54%) and sensitivity (100%) of passing the HTT was calculated. Secondary analysis using multiple regression revealed 3 significant variables for predicting ending HR during the HTT. They were: 1) absolute VO2 max (l/min), 2) age, and 3) HR at 30 min of exercise during thermoneutral exercise. Conclusions Exercise in a thermoneutral environment had a positive predictive value of 100%, thus, if a subject has a HR ≥130 bpm at 30 min of exercise in a thermoneutral environment, they are very likely to fail a subsequent 2-hour HTT in the heat and be classified as heat-intolerant. Therefore, prior screening has the potential to save time and money, along with providing safety to a heat-intolerant subject.
- Źródło:
-
International Journal of Occupational Medicine and Environmental Health; 2023, 36, 2; 192-200
1232-1087
1896-494X - Pojawia się w:
- International Journal of Occupational Medicine and Environmental Health
- Dostawca treści:
- Biblioteka Nauki
Artykuł