Sedentary life 'speeds up ageing' There is now another good reason for regular exercise, say researchers Leading a sedentary lifestyle may make us genetically old before our time, a study suggests. A study of twins found those who were physically active during their leisure time appeared biologically younger than their sedentary peers. The researchers found key pieces of DNA called telomeres shortened more quickly in inactive people. It is thought that could signify faster cellular ageing. The King's College London study appears in Archives of Internal Medicine. An active lifestyle has been linked to lower rates of cardiovascular disease, type...