theguardian.com/lifeandstyl...
It's well known that walking is excellent exercise. Might not unleash the endorphins like running but I never realised quite how good for you it is, a neuroscientist says so, so it must be true.
Releases brain derived neurotrophic factor and vascular endothelial growth factor. Likely something traveling in a wheelchair cannot do.
Maybe it's only the likes of us with mobility issues that understand just how much goes into walking. The balance, the muscles involved, the signals going back and forth.
Anyway, a good article. Have a read.