I had a problem with this 6 years ago, and had to have surgery on the disc - but it was all ok until the last 12 months. The disc went out during training a year ago and its been an ongoing thing ever since. A couple of times i thought i had it beaten, and then it would come back in full force as a result of training (kicking seems to be be the catalyst) - which is very frustrating and dis-heartening.
I'm dying to find something that actually works - or at least a way forward with the goal of getting back to training properly without fear of it re-occuring.
i've been focusing heavily on core exercises since the initial injury 12 mths ago, but no improvements yet. At the moment most exercises involving my back, and anything that places any sort of compressive force on my spine (ie. running, skipping, jumping, lifting any amount of weight) brings about inflammation and discomfort. The sciatica is nowhere near as bad as after the initial injury, its more just a numb burning that lasts a couple of days. Anti-Inflammatorys help. I think i might try to spend a bit more time walking, i've been doing stationary bike as it is better cardio - but perhaps the walking might be better in terms of rehabilitation for the injury.
anyway that is all probably irrelevant to your question, i just felt like sharing in case anyone has any red hot tips about how to get better.
My only suggestions are that the one thing that i do believe is greatly beneficial (and has really helped me) is swimming. I cant do it at the moment because i have a shoulder injury also, but previously it has really helped, its a good low impact exercise that really builds your total body strength and cardio.
The other thing to watch out for is your posture. I sit all day, and until recently hadn't worried too much about my posture - which is probably a contributing factor to all my ailments. I've since swapped to a kneelsit chair and am a lot more conscious of my posture. Since good posture is more of a preventative thing, i cant say it has had any benefit to the injury - but it cant hurt for the future to develop some good habbits.
but given how many problems i've had, you may want to take that with a grain of salt
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