Underneath all the practical reasons for cycling there is almost a magical quality that transforms the mind and spirit as evident in this article:
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“I said, ‘This cannot be,’ ” Dr. Bloem, a professor of neurology and medical director of the hospital’s Parkinson’s Center, recalled in a telephone interview. “This man has end-stage Parkinson’s disease. He is unable to walk.”
But the man was eager to demonstrate, so Dr. Bloem took him outside where a nurse’s bike was parked.
“We helped him mount the bike, gave him a little push, and he was gone,” Dr. Bloem said. He rode, even making a U-turn, and was in perfect control, all his Parkinson’s symptoms gone.
Yet the moment the man got off the bike, his symptoms returned. He froze immediately, unable to take a step.
Dr. Bloem made a video and photos of the man trying to walk and then riding his bike. The photos appear in the April 1 issue of The New England Journal of Medicine.
After seeing that man, Dr. Bloem asked 20 other severely affected patients about riding a bike. It turned out that all could do it, though it is not clear why.
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https://www.nytimes.com/2010/04/01/health/01parkinsons.html?src=mvoldId.20100401155025944
Biking in Baltimore