BBC Sounds, music radio podcasts.

This is Beyond Today from BBC Radio 4.

I'm Simon Mundi. Usually I host the Don't tell me the score Podcast, but I'm here while Matthews away.

Today, why does sports people dope when the chances of being caught seem to be so high. Last week it was the swimming world World Championships and there were some sensational

performances in the pool and we're going to hear from Adam Petey who was the

undoubted star of the show but the specter of doping was also present.

During that National Anthem, Horton did not stand up on the medal podium.

And in one high profile incident,

Australian Mack Horton and Britt Duncan Scott refused to share the podium with Sun Yang

and he's a Chinese gold medal winning swimmer.

What we can't know is what happened before the podium but Craig Lords been reporting on

swimming for three decades and broke the story about Sun Yang smashing a vial of his own

blood. The moment Sun Yang stepped up to get his gold medal, he turned to his left, which was the bronze medalists.

Duncan was sharing the bronze medalists with the Russian athlete, and basically we all thought he was about to shake hands with them.

Well, goodness me, what was that?

That was in the face of Duncan Scott.

Was that right?

Sun Yang of China?

Not quite sure what that was about, but that was directed very much in the direction of Duncan Scott.

I'm not quite sure what happened there.

But instead he screamed something, it was something extremely aggressive with his clenched

fists and leaning in towards Duncan, screamed that at him, then received his gold medal,

...