About Associate Professor Ollie Jay

Ollie’s research primary focuses on human survival in extreme environments. Specifically, his work identifies the various factors that lead to heat exhaustion, cardiovascular failure and dehydration during work and/or physical activity in hot environments, as well as among the general population during heat waves.

Ollie Jay leads a research program in exercise and environmental physiology within the Faculty of Health Sciences at The University of Sydney.

From 2008-2013, Ollie was Director of the Thermal Ergonomics Laboratory and an Assistant/Associate Professor in the School of Human Kinetics at the University of Ottawa in Canada. In January 2014, Ollie joined the Faculty of Health Sciences and moved his research program to the University of Sydney (www.thermalphysiology.com). His research primarily focuses on developing a better understanding of thermoregulatory impairments in specific populations (e.g. children, MS patients, obese, burn patients); cooling/survival interventions for at-risk groups (e.g. elderly) during heat waves; and heat stroke prevention in workers and athletes. Ollie has supervised numerous post-graduate students, with many continuing to pursue academic careers at institutions across the world. Post-graduate students working in his lab have averaged 11 publications each at the PhD level, and 4 publications each at the MSc level. Ollie has also established several working collaborations in the USA, UK, Canada and Qatar, presenting post-graduate students under his supervision an opportunity to spend a period of time in an international laboratory. Ollie is actively looking for motivated students (both locally and internationally) to join his research team in Sydney.

Selected publications

1. Ravanelli NM, Hodder SG, Havenith G, Jay O* (2015) Heart rate and body temperature responses to extreme heat and humidity with and without electric fans. Journal of the American Medical Association (JAMA); 313(7):724-25.

2. Cramer MN and Jay O* (2014) Selecting the correct exercise intensity for unbiased comparisons of thermoregulatory responses between groups of different mass and body surface area. J Appl Physiol; 116(9):1123-32. Highlighted by Invited Editorial: Cheuvront SN (2014) Match-maker: How to compare thermoregulatory responses in groups of different Body mass and surface area. J Appl Physiol; 116(9):1121-22.

3. Smoljanic J, Morris NB, Dervis S, Jay O* (2014) Running economy, not aerobic fitness, alters thermoregulatory responses during treadmill running. J Appl Physiol; 117(12)1451-9.

4. Morris NB, Bain AR, Cramer MN and Jay O* (2014) Evidence that transient changes in sudomotor output with cold and warm fluid ingestion are independently modulated by abdominal, but not oral thermoreceptors. J Appl Physiol; 116(8):1088-95.

5. Jay O*, Molgat-Seon Y, Chou S and Murto K (2013) Skin temperature over the carotid artery provides an accurate non-invasive estimation of core temperature in infants and young children during general anaesthesia. Paediatr Anaesth; 23(12):1109-16. Editor’s pick of the month - Dec, 2013. F1000Prime Recommended.

6. Morris NB, Cramer MN, Hodder SG, Havenith G and Jay O* (2013) A comparison between the technical absorbent and ventilated capsule methods for measuring local sweat rate. J Appl Physiol; 114(6):816-23

7. Bain AR, Lesperance NC and Jay O* (2012) Body heat storage during physical activity is lower with hot fluid ingestion under conditions permitting full evaporation. Acta Physiol (Oxf); 206(2):98- 108. Highlighted by Invited Editorial: Barwood M (2012) Hot drinks all round. Acta Physiol (Oxf.);206(2):94-95

8. Deren TM, Coris EE, Bain AR, Walz S and Jay O* (2012) Sweating is greater in NCAA football linemen independently of heat production. Med Sci Sports Exerc;44(2):244-52

9. Jay O*, Bain AR, Deren TM, Sacheli M and Cramer MN (2011) Large differences in peak oxygen uptake do not alter the change in core temperature and thermoregulatory sweating during exercise. Am J Physiol Regu Integr Comp Physiol;301(3):R832-41

10. Jay O, Reardon FD, Webb P, Ducharme MB, Ramsay T, Nettlefold L and Kenny GP* (2007) Estimating changes in mean body temperature for humans during exercise using core and skin temperatures is inaccurate even with a correction factor. J Appl Physiol; 103(2):443-51. Highlighted by Invited Editorial: Sawka MN, Castellani JW (2007) How hot is the human body? J Appl Physiol;103(2):419-20