I have leg problems,after 200 or 300 feets of walking my legs comes so tired that i have to stop and rest for a few minutes , and walk another same distance and so on and on ,for two years now i have been having all kind of test , dopler , magnetic resonance, arterographie ect ...and theire is no blocage in my arteries sufficient to cause this , i am discourage and do not know what to try anymore , thanks.