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Is walking 3 miles a day good for a 70 year old?

According to a study published in the journal *Circulation*, older adults who walked 6,000–9,000 steps daily (around 3–4 miles) were 40–50% less likely to have a heart attack or stroke than those who walked only 2,000 steps. This provides a strong indication that, for most, walking 3 miles a day is not only good but highly beneficial for a 70 year old.