Do you do weight training? Its meant for developing the strength of the body.
I do sometimes but I am not consistent. 
Do you do bodybuilding, powerlifting, or only weightlifting? 
If I had to guess it is more like weightlifting. I am not sure what the main differences really are though.
Well they're just used for training for shot put, discus throw, and javelin throw.
My main motivation is to not get out of shape so mainly weight train to maintain and stay healthy.
I see, then you must play sports like football, baseball, or basketball?