'Sit less, move more'

An hour's "brisk exercise" each day offsets the risks of early death linked to a desk-bound working life, scientists suggest.

The analysis of data from more than a million people is part of a study of physical activity published in the Lancet to coincide with the Olympics.

Professor Ulf Ekelund from the Norwegian School of Sports Sciences led the study and told Sarah Montague the message was "sit less, move more, and the more the better."