Watch Caster Semenya obliterate Cristiano Ronaldo's core crusher score

South African two-time Olympic champion easily passed the benchmark set by the Juventus star

Caster Semenya has won two Olympic golds and three world titles in the 800m. PA Wire

Cristiano Ronaldo laid down a challenge to his 200 million Instagram followers this week in the first edition of the Living Room Cup.

The Juventus and Portugal superstar filmed himself doing a core crusher exercise and managed to do 142 reps in 45 seconds. A very impressive effort and not entirely surprising given his immense physical fitness.

"Can you step up and beat my core crusher record?" he asked in the video caption.

Well, two-time Olympic gold medallist Caster Semenya has responded with an emphatic "yes".

The South African 800-metre runner posted her efforts to her Instagram account and managed to obliterate Ronaldo's score with 176 reps.

As well as golds at London 2012 and Rio 2016, Semenya is a three-time world champion, so if anyone could beat Ronaldo at his own game, it would be the 29-year-old track star.

Watch her smash the core crusher challenge here: