If you have to ask the question then the answer is probably self evident. That said, if you find you can comfortably listen to music at low volume (proper low, not relatively low compared to what you were used to) then it may not be a bad idea because it will keep you attuned to accepting sound.
If your tinnitus was due to loud sound then it I dont think it would be a good Idea .
Saying that ,if you cope ok with them on very low and find they don't spike your tinnitus then go ahead.
Keeping fit and enjoying life is the best way to deal with the unwanted emotions tinnitus can cause.....enjoy yourself...lots of love glynis
Can you safely listen to your earphones at a low volume anywhere else (outside of the gym)? Then you probably can do so in the gym as well... But be careful, with all the environmental noise at the gym it's really easy to turn the earphones up too loud.
Do you really need to listen to earphones while in the gym? Can you cope without, or is it just luxury? I personally wouldn't bother, but that's just me