Start the School Year Strong with a Healthy Spine Back-to-school season brings excitement—new classes, new sports, and fresh routines. But it also brings new physical stress on growing bodies. From heavy backpacks to long hours sitting in class (and on devices), students are putting more strain on their spines than ever before. Add in fall sports, and it’s easy to see why so many kids (and parents) start noticing aches, fatigue, and posture changes within the first few weeks.