 It's a complex setup, but luckily one person who understands all of this far better than me is Dan Snapes, a postdoctoral research fellow in sport and exercise physiology. So Phil's going to be doing kind of four-minute stages, a treadmill-based assessment. We're going to monitor kind of different physiological measures such as core temperature, skin temperature, heart rate, to look at how he copes within the hot environment.