Michael J. Fox no longer walks after "breaking so many bones" amid his battle with Parkinson's .

RadarOnline.com can reveal the Back to the Future star has given a fresh update on the progression of his illness, having been diagnosed with the neurological disorder in 1991 when he was just 29. Article continues below advertisement

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And according to Fox , now 64, he is now at a stage where he’s fearful of moving in case he falls.

He said his vulnerability to breaking bones began during the peak of his acting career, where he was seen on screen doing everything from somersaulting over people to sliding across car bonnets.

"And that's (the point) where I break stuff, it's a

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