The analysis of more than 226,000 people around the world showed 4,000 was enough to start reducing the risk of dying prematurely of any cause.
Just over 2,300 is enough to benefit the heart and blood vessels.
Every extra 1,000 steps beyond the 4,000 reduced the risk of dying early by 15% up to 20,000 steps.
The original article does say that up to 20,000 is an improvement. After that point may be negative.
In the run-up to the 1964 Tokyo Olympics, marketing executives in Japan decided on the idea of walking 10,000 steps a day as part of a campaign to promote a new pedometer. Ever since then, it has been touted as a magical number for staying fit and healthy.