On 30/09/2014 21:20, Bret Cahill wrote:
That would all depend upon having a nice even level road.



Or a nice knobbly mountain bike.



In the

event of disaster neither of those are likely, whereas feet can climb

over things very easily and going up hill (necessary to escape tidal

waves ) is quite natural and simple on foot. I would imagine that

poor quality knee joints are not too hot for cycling in any case.



Actually my knees work quite well on a bike because their movement is

constrained by the pedals, so they tend not try to twist out of

alignment, which they can do when I'm walking, particularly on uneven

ground.

Tennis players with bad knees -- basically all tennis players over 40 -- will often cycle for knee therapy.

Stay in lower gears and cycling actually makes knees better.


Bret Cahill


Then why do so many cyclists develop patellofemoral syndrome?