Bono of the band U2 performs live on stage during the Bambi Awards 2014 show on November 13 in Berlin, Germany. Photo: CFP

Bono, the frontman of the Irish rock group U2 who was injured in a cycling accident last year, said on Friday his recovery has not been easy and he may never play guitar again.

In a blog on the group's website, the 54-year-old rocker said he broke his hand, shoulder, elbow and face and described how he "blanked out on impact" during the cycling accident in New York's Central Park, which he said he could not blame on anyone but himself.

"Recovery has been more difficult than I thought," he said in the message written from his home in Dublin. "As I write this, it is not clear that I will ever play guitar again. The band have reminded me that neither they nor Western civilization are depending on this."

Bono, who included an X-ray of his elbow in the blog, said he did not remember how he ended up in hospital with the bone in his upper arm sticking through his leather jacket.

"Very punk rock as injuries go," he added.

Bono's arm was shattered in six places. Doctors inserted three metal plates and 18 screws to repair the injury. He required hours of surgery and has had extensive therapy. But he is expected to make a full recovery.

Bono described the cycling spill as a "freak accident" and said the pain it caused did not compare with his disappointment in having to cancel U2's week-long appearance on NBC's The Tonight Show Starring Jimmy Fallon.

He added that he will have to concentrate hard to be ready for the U2 tour that begins in Vancouver in May.

The cycling accident was not the only harrowing event for the rock star in 2014. In November a private plane in which he was traveling from Ireland to Germany lost its rear hatch but the pilot managed to land it safely.