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such as yours is usually chronic conditions worsened with lifting. Though surgery is the definitive treatment, it is not attempted for each and every case due to risks associated with it, besides long term treatment is possible with conservative line of approach.
If MRI of spine revealed a disc prolapse
or nerve root compression
(sciatica), the next best test is to get an EMG of lower limbs with H reflex. This will give you an idea about associated nerve deficits. The test can be done under the guidance of neurosurgeon / neurologist
If the test reveal abnormal test, then surgery is recommended. Else you might plan long term treatment with analgesics, physiotherapy
or intermediate intrathecal injections.
Avoiding further strenuous physical activity such as bending and lifting heavy weight is utmost importance.
Hope this helps.
Wish you good luck!