No matter what you consider your daily grind -- sitting behind a computer, running errands for your family, keeping up with your favorite TV shows -- most of us spend way too much time on our expanding derrieres. Studies say that too much sitting puts us at greater risk for diabetes and cancer, increased inflammation and insulin levels, and slower metabolism, among other issues. And sloths aren't the only ones who suffer. People who hit the gym and watch their diets are also having an increasingly hard time staying trim with the longer hours we spend on our booties. We're busier than ever, yet when our hectic schedules are over, we crave nothing more than -- you guessed it -- collapsing onto our backsides. What can we do when our lives revolve around sitting for work and relaxation?