Photo: anyeetx, Flickr

School's back, and though many will weather this season of change by developing a protective layer of fat called the Freshman 15, you don't have to be one of them -- make fitness a priority this semester, after studying of course.

And while I'm willing to bet your school has a decent gym, you don't even need one -- there are plenty of great workouts you can do in your dorm room, no matter how big or small. Amie Hoff, master trainer for New York Sports Club, recommends a few simple -- and free -- exercises you can do in the comfort of your own space, like:

• Push-ups -- from your desk, but make sure your desk is against the wall for these. If it's not, take them to the floor.
• Bicep curls -- using your text books as weights.
• Tricep dips -- off the bed.
• Squats and lunges -- using your chair for stability.
• Crunches -- with your text books adding extra weight.
• Cardio blasts -- a couple quick sets of jumping jacks and stadium runs will help burn off that cafeteria food.

And, if you have access to a fridge, Hoff advises you to stock it with waistline-friendly and convenient snacks, like string cheese, apples, pre-cut veggies and mini yogurts. Click here for more great tips, or feel free to add your own.