Walking up to 10,000 steps per day lowers the risk of heart disease and early death even if people spend most of their day sitting down, research suggests. Experts have previously found that people who spend a lot of time sitting while awake, such as at their desks or watching TV, are more likely to suffer an early death and develop heart disease. But, until now, it has been unclear whether walking can offset the effects of sitting down for most of the day. A new study, published in the British Journal of Sports Medicine, found that every extra step above 2,200 steps per day – up to around 10,…