 So typically the duration of heat exposure will dictate how much those individuals are affected. So when we look at things like 100 metre sprint, 200 metre sprint, it's very unlikely that they're going to be impacted by the heat. And there's actually lots of evidence to suggest they will get benefits from the heat because the muscles work a little bit more effectively for those events. Anything beyond 1,500 metres on the track, we'll start to see some impairments in performance when we expose ourselves to heat.