Exercise is good for your Mind too!
Here are some other benefits of having a regular exercise routine:
Regular exercise causes stimulation of brain chemicals that help relaxation, happiness and relief of depression and anxiety.
Workingout takes energy but it also gives it back by increasing matabolism
Regular exercise helps with getting a better night's sleep (National Sleep Foundation)
Aerobic exercise promotes highter blood levels of hormones beneficial to memory. (Behavioral Brain Research)
Getting into shape and continuing to exercise helps to turn on the light bulb of "great ideas" in comparision to non-exercisers. (Frontiers in Neuroscience)
Knowing that you are capable of getting through workouts and achieving goals pumps your confidence level that benefits other areas of your life.