Just before this BBC podcast gets underway, here's something you may not know.

My name's Linda Davies and I Commission Podcasts for BBC Sounds.

As you'd expect, at the BBC we make podcasts of the very highest quality featuring the most knowledgeable experts and genuinely engaging voices.

What you may not know is that the BBC makes podcasts about all kinds of things like pop stars,

poltergeist, cricket, and conspiracy theories and that's just a few examples.

If you'd like to discover something a little bit unexpected, find your next podcast over at BBC Sounds.

This is the short edition of More or Less, first broadcast on the BBC World Service.

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The details of our complete range of podcasts and our terms of use,

go to BBCworldservice.com slash podcasts.

Hello and welcome to more or less on the BBC World Service.

We're the balsamic vinegar on your statistical salad and I'm Tim Harford.

Let's talk about jogging. Is it a convenient way to keep fit or a steady plod

towards the chill solitude of the grave because as the BBC rather unhelpfully

reported this week too much jogging as bad as no exercise at all which doesn't tell us a lot. The clues in the phrase, too much. Too much of

anything is excessive, but that's not really a fact about jogging, that's a fact

about how the English language works.

Anyway, soon messages came flooding in to more or less at BBC.co.uk.

Some were sceptical and some rather worried.

I feel very healthy and wonder how close to death am I really?

Asked Mania, who regularly jogs more than two and a half hours a week at a pretty good pace. The BBC article was referring to a study published

in the Journal of the American College of Cardiology, so we decided to turn to somebody

...