There is an Orrit Fitness Center in Gejiahu, West Street. The monthly card 100, the 30-time card 150 does not include bathing, and other season cards should be considered cheaper in Chengde. Of course, the conditions may be worse than others, but the fitness requirements are not so high, and the facilities are basically available.
There is also a Polaroid in Yongxing, which is of high grade and definitely expensive.
There is also a fitness center behind Guang 'an Shopping Mall. I forget what it's called. The price is not clear, and it should not be cheap either.
I didn't notice it elsewhere.