As far as I know, there are only four gyms on Yantai Road, all of which are not far from the university town.
On the west side of Licheng Garden, there is a gym next to Sunshine Insurance Company, which is also very close to the university town. 18, 7, 1 1 buses all pass there.
There is a black horse to the north of New Mart. I don't know if it's still there.
There is also a gym upstairs in New Mart. I forgot its name. You can take the elevator.
These gyms are not far from the university town, and they are all on Yantai Road. 18, 1 1 buses all pass by.