Cristiano Ronaldo has launch his own gym chain in the latest expansion to his ever growing business portfolio.

The five-time Ballon d'Or winner has already tried his hand at being a hotelier, and he has now moved into the world of fitness with a new location in Madrid.

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The Portuguese forward was in attendance as he unveiled his new 'CR7 Crunch Fitness' gym in the Cuidad Lineal district of Madrid, and he even shared a secret as to how he got his own impressive abs.

Speaking to journalists, he said: 'It's not true that I do 3,000 sit-ups every day. I usually train 4 or 5 times a week with 200 or 300 sit-ups.

'It's not good to do too much because you can have problems with low back pain.'

Although he is clearly focused on his post-football career with a number of money-making schemes, the 32-year-old surely has a few years left at the top of his game.

Ronaldo has featured 33 times for Real Madrid in all competitions this season, scoring 26 goals along the way.

Zinedine Zidane's side are currently top of La Liga, boosted by their win and Barcelona's defeat last weekend.

In fact, the double is still on for the Bernabeu side, given their two-legged victory over Napoli in the last 16 of the Champions League.