Rio Ferdinand's intensive boxing training continues as ex-Manchester United star does press-ups with 50kg weights on his back

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Rio Ferdinand is priming himself for his boxing debut early next year – and the former Manchester United defender appears to be feeling the strain as his training steps up.

Ferdinand, who earlier last month revealed he was targeting a fight in February, was seen performing press-ups with 50kg weights on his back.

In a video posted on Instagram, trainer Mel Deane wrote: '@rioferdy5 last set and reps of the session with 50 Kgs on his back and my fat hole leaning on him !! Hahah'. 

Former Manchester United defender Rio Ferdinand is in training for his boxing fight

Ferdinand was seen struggling under 50kg weights as he performed press-ups this week

Ferdinand, 39, is hoping to secure a boxing licence next year and although his switch in sport has been written off as a publicity stunt by some he appears to be taking training seriously.

He has also been working with former super-middleweight world champion Richie Woodhall towards earning a boxing licence.

A spokesman for Betfair, the bookmakers behind Ferdinand's move into boxing, said: 'Rio is showing big improvement as he steps up his training on his journey to gain a professional boxing licence.'

Ferdinand's trainer Mel Deane can be seen laughing as the wannabe completes his workout

Former rugby player Deane has been working with Ferdinand and girlfriend Kate Wright at their home, helping the ex-England captain to boost his fitness after his 2015 retirement from football.

Ferdinand also appears to be targeting a string of fights, rather than just a one-off publicity-spinning bout.

In a video posted on his YouTube channel FIVE, he told former team-mate Cristiano Ronaldo his debut would be in February before adding: 'But then after, in June or July, I'll have another fight. You should come.' 

Ferdinand posed with girlfriend Kate Wright for a loved-up snap on Instagram on Monday