About 10 years after he first started studying the causes of heart disease, Jerry Morris started to jog. “I was the first person to run on Hampstead Heath, in the 1960s," he'd later tell The Financial Times: Every Sunday morning, if the weather was at all possible, I took off my coat, and my little boy carried my coat, I took off my jacket and my little girl carried my jacket, and I ran for 20 minutes.