Is there any way to avoid writer's butt?

Writing novels full-time and snacking in a sedentary position is surefire way of seeing your rear end expand. So what are authors’ best tips for keeping trim?It began so well. When I first left my office job to write novels full-time I was a totem of cast-iron discipline. At the desk by 9am, I never faltered, never took a day off.Puffed up with the New Regime, I simultaneously followed Weight Watchers to the letter: so much easier when you can meal-plan and cook at home. I not only produce