My first ever post. Hope I'm on the right Forum. 6 months ago I suddenly started having fatigue in my leg quads when I walked 50 feet. I've been in good shape all my life playing tennis, skiing, etc. Have seen all the doctors, internist, cardiologist, orthopedic, neurologist, and done all the tests, MRI's, ultrasounds, X-rays, blood tests, etc. Everything is negative, and the doctors and I are stumped. Can anyone suggest anything, or another Forum where this post might be more appropriate??