Bike doc

Matt Seaton: The main difference between a woman-specific bike and a small man's one is that women tend to have relatively longer legs and shorter torsos than men, so the frame geometry is adjusted.

We are coming for your children

Commercials for junk food are being banned on children's television, but advertisers are moving onto a new battlefield - the internet. Helen Pidd reports.

The nuisance is mobile

James Harkin: With no other decent reason to ban the use of mobile phones, hospitals are reverting to snobbery.

Lose weight, gain extra lives

David Adam: Scientists have blamed video games for the explosion in childhood obesity. Nike, however, thinks it has the answer. It has invented an electronic gizmo that sits in the shoes of video-game players and rewards their exercise in the real world with prizes in the virtual one.