From Jon Arch, Welwyn Garden City, Hertfordshire, UK
As you report, there is a long history of attempts to design drugs that mimic the effects of exercise (24 April, p 46). But why use drugs?
I was at a conference about 15 years ago where a presenter claimed he had been able to train for a marathon while sitting at home watching television, with his legs jerking (quite violently in his video) in response to electrical stimulation. .
