When sitting all day in front of a computer, I like to take breaks and use a jump rope. It helps get the blood flowing, and I'm able to think better and concent

When sitting all day in front of a computer, I like to take breaks and use a jump rope. It helps get the blood flowing, and I'm able to think better and concentrate more easily afterwards. Also, many people have said it before, but squats are absolutely amazing at getting in shape. Yes, if you do them incorrectly, you will hurt your knees. Starting Strength by Rippetoe tells you how to do them correctly.