I've been dealing with a sport-related injury since December 2006. Was training for a marathon when my left thigh went numb (about a month before the marathon). After a long road of doctors and wrong diagnoses, I was referred to a Neurologist who did an EMG and Nerve Conduction Study. After those results, my sports doc got me a Nerve Root Steroid Injection in my L5 area. I got 4 days of relief and now my problem is back to where it was before I got the injection. When I try to run, my thigh (mostly the lower hamstring area by the knee) feels like it's heavy and uncontrolable, pressure-like. I feel like I really have to drag that leg to get it going. I'm good for about a mile and then the problem starts. The doc thought it was inflammatory-related and thought the shot would help. Anti-inflammatories don't help. Had a back MRI and it showed no disc or vertebra problems so I wonder if there is a pinching somewhere else along that nerve? I also have a heel spur in a weird place (the inner side of my heel (big toe side) as opposed to the bottom of my heel). Was thinking maybe there's a connection since I got the heel spur about 2 months before the numbness of my thigh. The results of the EMG/NCS are below. Any thoughts based on this what could be going on?

NCS of the bilateral lower extremety showed a low amp of the peroneal nerve.

EMG showed mild evidence of acute denervation in the anterior tibialis and the paraspinal muscles.

Thanks for any help. I'm at my wits end and have just about had it with doctors. Maybe I'm not going to the right type of doctor?

Kim