Can I still exercise whilst pregnant? I have heard conflicting information on this and despite the fact that I have been using a cross trainer for the last few years (at home) and consider myself quite fit, I am reluctant to do anything that may be dangerous. I just want to use the cross trainer for fitness. Not interested in lifting weights or anything like that. I just want to maintain my fitness and not get totally out of shape. BTW I am in my first trimester.