Gym while ttc?

Girls I have a question, I'm trying to conceive baby #1 without luck yet, but I still want to be in shape while I'm ttc, so I can have a better shape when i finally conceive. I was wondering can I still go to the gym? To clarify my routine consists in 20 of cardio on the treadmill, and some leg or arms exercise depend of the day, with 10lbs max three or four times a week, can this interfere with my plans of ttc? Can this be bad for me instead of being a good thing?. Some of you have conceive while going to the gym?