When people think about physical therapy, they usually think about muscles and movement, not digestion. But in my work with infants, I see the connection between GI issues and motor development play out constantly, and it's one of the most under-discussed pieces of early development. Reflux and constipation aren't just uncomfortable for your baby in the moment — they can quietly shape how they move, position their body, and build the foundational strength they'll need for rolling, sitting, crawling, and eventually walking.