I work out to lose weight. I do what they tell you not to, and exercise on the same machine (the elliptical) every morning. I know I should shake it up and work different muscles every week, but I like dancing on the elliptical to some great music on my iPod. I figure that I don't need to change it up until either my muscles start to feel sore or I reach my goal weight (and want to build muscle).
For every five pounds I lose, I try to change the settings on the elliptical. Sometimes I do, and sometimes it's still too difficult. I know that I need to increase my activity and decrease my caloric intake to compensate for my lower weight. So, without trying to, I have increased my fitness level.
I started on the elliptical at a Level 8 incline and Level 6 resistance. I am now at a 9 incline and 11 resistance. And I am burning about the same amount of calories as I was 50 pounds ago - in the same amount of time - which is incredible! It feels great to be more fit and healthy all the way around!