I have been having a weak feeling in my left leg for about 4 months now, it is not stopping me from my day to day activities I play vollyball and run on a treadmill when possible. Thats what makes this feeling so puzzling to me, it almost feels like I need to limp as I walk, my right hip started popping as I walk about 3 weeks ago can't tell if its muscle or bone related. My question is that I drive a pick up 8 hours a day for my job with no lumbar support and have had some back pain on and off that has caused me to see a chiropractor. Could this back pain be causing this sensation in my legs? I have seen my doctor about this situation and after a CT Scan to check for clogged arteries, a brain MRI, A spine MRI, Nerve Conduction test, a Colonoscopy, Endoscopy, gall bladder testing, and blood tests all they have come up with is a vitamin D defieciency, and my gall bladder is only working at 22% but they feel it does not need to come out, my Tyroid is in normal range but on the borderline of being low. This sensation is very bothersome and I fear that it will get worse even though I have been tested for practically everything. Could my job of sitting all day long driving be causing this problem and if so what can I do to help with it. I probably don't exercise as much as I should and my flexabitity is terrible. Any suggestions would be appreciated..