I have been a UK size ten all my adult life. I walked the Yorkshire three peaks earlier this year and ended up with a black toe nail that eventually dropped off. Time for some new boots!
During a long weekend in the Lakes I popped into Ambleside and got measured up. My right foot is now an eleven and my left foot almost an 11.5
My theory is that all the half marathon training I did earlier in the year has "flattened" my feet out. The assistant said that one of the other staff members is an ultra runner and his feet can increase by four sizes which supports this.
Never heard of this before - is this a real and common effect?