The BBC TV news today carries a report on a study of a group of keen 64 to 82 year old cyclists. None of them are e-bikers though, they do their riding in the Surrey hills the hard way. As well as the obvious fitness benefits we'd all expect, it's claimed blood tests show their immune systems are equal to that of 20 year olds. It'd be interesting to have the outcomes from a similar study of regular e-bikers. .