Why should my college exercise routine vary?

Your body is really smart. If it knows exactly what to expect every time you exercise, it can figure out ways to do the work without having to expend as much energy, or otherwise adjust to the motions you're putting it through. If you do the same routine over and over again, you work the same muscle groups continuously.

At first they'll respond to the new workout by building strength, endurance, and tone. But, eventually, your muscles will plateau at the level of strength, endurance, and tone that a particular level of workout can elicit. That's why it's important to vary the muscle groups you are working, as well as the level at which they are being worked.

This also goes for fat-burning exercises, such as running and using the elliptical machine. If you run two miles every day, you'll see dramatic results at first, but eventually your body will get accustomed to this training and you won't have to work as hard to complete the run. This is when you either have to run farther, change your course (add some hills), or alter your pace (either run faster, steadily, or add some sprints to your jog) to make sure you are still working out effectively.

There will never be a point at which you don't burn calories from exercising, but you want to make sure that you are burning as many as possible.

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