Hello, I train 2/3 times a week and feel the benifits of it.I use a cross trainer due to knees etc.....I feel the benifit and do lose pounds........BUT my pot belly never seems to go! is this because I need to do sit ups? Cut bread pasta out of my diet? or what.........It is getting me down! any ideas , tips etc would be greatfully received. ps.diet is being observed!