“Can I go to the gym with a disc hernia?”

Yes, but be careful and do not aggravate the injury. Strengthen your core can be very helpful for disc pathology.

First of all , what sort of "disc hernia" do you have ? Is it symptomatic while you are at rest ? Do you have on-going neurologic issues /defects as a result of this "disc hernia"? I would say that going to the gym and doing some light exercises will pose no problem. Would avoid forward torso bending; would stick with the recumbent bicycle which is an excellent thing to do for any low back pain . Remember to stretch at the END of your workout (NOT at the beginning like so many say; at the beginning of any work-out, the thing to do is WARM UP (i.e. walk /light jog on the tread mill; jumping jacks; walking lunges , etc.). This gets the heart pumping and the core temperature up.