It is about one month that when I walk one or two hundred feet my legs get so heavy and tired that I have to sit. And after few minutes sitting I can walk again but I can’t go more than that.

My Dr. has sent me for two different ultrasounds as follows:
1. Lower Extremity Arterial Duplex Study
2. Ultrasound Bilateral Legs Venous Doppler
And result of both exams shows everything is normal.

So far doctors don’t know the cause and how to treat. Is there anyone who could help me?

Thanks for your help