Gym or sports club by Sasang Station

Hi, I've just moved to an apartment right by Sasang station and I'm looking for a gym and/or sports clubs nearby. The gym just needs to have weights and treadmills. I'd also be interested in learning taekwondo.

I know seomyeon is not too far, however I would prefer something closer.

I've tried searching maps and forums but have not found anything definite.

Would appreciate your help with this!

Thanks!