Growing number of studies assessing whether heat training can help people prepare for scorching temperatures Even as summer temperatures soar, the sauna trend is booming, with some venues touting them as a way to beat the heat. But while experts have urged caution about sweating it out in hot weather, a growing number of studies are considering whether heat training could help people prepare for heatwaves. With parts of the UK experiencing their fourth heatwave of the year, the UK Health Secu...