Hi! Swimming and upper body weight lifting are activities that can lead to TOS. That being said, of all the people in the world that have swam or lifted weights, why you? Right?

I have problems with nerve pain and tingling in my feet and nerve pain in my lower leg on one side, that leg just gives in on me sometimes now. This is because my hip flexors are extremely weak. Somehow the TOS caused this weakness to develop, I believe that the scalenes were helping me walk, sounds crazy, I know, but the feet/leg problems started after getting bilateral botox injections in the anterior scalenes. I asked Dr. Donahue about this, and he said that he has heard of it happening before, but he said he had no explanation for it.

What Jomar said about the foundation being misaligned sounds like words right out of my chiropractors mouth. The hip on my weak leg side is always much higher than the hip on the other side when I go to the chiropractor.

Here is some nice reading on Arterial Thoracic Outlet Syndrome:
http://surgerydept.wustl.edu/TOS_Patients_Arterial.aspx