Does he really just want to go to the gym with me? Very odd. Older guy from work...?

[Angie C]

Hi... I work at a walmart jewelry counter, and this guy that works in a different section of the store has been making conversation with me at every opportunity he gets. Funny thing is, i am 19 and he is in his late 30s. Anyway, he and I have talked about excersise and gyms in the conversations we have had. I really do not know him very well, it is just that every single time we pass by eachother in the store he stops to chat with me. Now, he suddenly asked me today if I would come to the gym with him sometime to crack his back by walking on it and putting weights on it for him, since he has a bad back or something. says he doesn't have the money for a trainer or chiropractor. Would it be weird if I did this for him? He did take down my number so that we could make it a plan... I did say yes b/c I do not want to hurt his feelings or anything. I just find it odd that of all the people in the world to ask, he picks me. he is a very outgoing guy that must have tons of friends, including a wife. Is this really odd, or am I just overthinking things, and would it be too weird if i went to do this? THANKS!!!!!!