Why there's no need to sweat over the trend for hot yoga

Every weekend thousands of yummy mummies crowd into rooms heated at a stifling 40C, paying around £14 a session, in the hope it will do them some good.But a study has found that hot yoga, also known as bikram yoga, is no better for your health than doing it at room temperature.Yoga practitioners claim the heat causes blood vessels to dilate, lowering blood pressure, which could protect against heart attacks and strokes.However an experiment examining the blood vessels of people doing hot yoga...