Originally Posted by
Grand Bois
Your foot doesn't bend when you pedal a bike. It tenses and pretty much stays straight, just as it does when you walk up stairs.
Grant is correct. But what he seems not to realize that it takes muscle to tense. Muscles can fatigue. If one has a stiff sole, the muscles will not tense as much and will fatigue later.
If Grant does not this this matters after 4-8 hours of riding, he is incorrect.