Changing my Activity Level?

During the summer I work a desk job and had my activity level set at sedentary. Now that I am back in school and walking to and from classes (I'm at school from 9 am or earlier until at least 5:30) and on my feet for a lot of the time in choir and voice lessons, I'm wondering if I should change my activity level to lightly active?

I'm continuing to work out three days a week as I was this summer at my desk job, but I'm up and moving a good distance about every hour walking to classes and carrying a pretty heavy backpack (I might add). What are your thoughts?

I would appreciate all the suggestions I can get!

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