Bono used to think his head was "harder than any surface it came into contact with".

The U2 frontman is still recovering from an accident he had while riding his bike in New York City's Central Park in November. Afterwards he needed reconstructive surgery on his face and he suffered injuries including three fractures to his left shoulder blade and hand.

It changed the musician's entire outlook on his own strength.

'I really used to think that my head was harder than any surface it came in contact with, and I don't anymore. I didn't come off a Harley-Davidson. I came off a push bike and smashed myself to bits. There is no glory here," he sighed to The New York Times.

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In February, Bono revealed the damage is so serious that he may never play guitar again. It's sadly still the case for the star, and it's still difficult coming to terms with the fact the movement in his hand will never be the same again.

'It feels like I have somebody else's hand. I can't bend these, and this,' he said, pointing to his hand.

'But they say that nerves heal about a millimetre a week, so in about 13 months I should know if it's coming back... It's all numb here [on my forearm], and this is titanium."

His shoulder has recovered and his face is almost fully healed.

U2 are currently rehearsing for their Innocence and Experience tour, scheduled to kick off at the Rogers Arena in Vancouver on May 14.

Following Bonos incident, the band had to cancel a week-long residency on Jimmy Fallon's US programme The Tonight Show, so they're now raring to get back onto the stage.

However, it won't be completely the same as before.

'But this is the hard bit because I can't play guitar,' Bono, 54, said, nodding towards his bandmates The Edge, Adam Clayton and Larry Mullen Jr. 'They don't seem to mind.'