Yes they have a fitness center.
As far as I know, no. But I use the Senior Center a few blocks away: swimming pool, free weights and machines, indoor jogging track. Track is free to use to community.
So, if you travel to Warrensburg regularly, there are many options. There is a bicycle and paved walking/jogging path at the South end of town (road DD).
As for the rooms at the Days Inn: clean, wi-fi always seems to be working, cable tv always seems to be working. I don't smoke, so, the non-smoking rooms are odor free.
And the rates are very low cost: I usually pay less than $80 a night.
So, if you are traveling on a budget, I find this Days Inn an easy fit.
Get an answer from Days Inn by Wyndham Warrensburg staff and past guests.