I bought a book on Gerd and I'm a bit freaked out after 2 solid days of really bad chest pain. It's recommending to avoid any cardio activity. However, it's important to remain fit if one has GERD. I run, love to cycle, go hiking, and the first few lines in this book state to avoid all of those things. Recommends yoga, which I enjoy Hatha yoga, but struggling with inverted poses as it hurts my chest (center upper). What are people doing to stay fit? Why am I afraid now to be mobile? I take Nexium but it helps very little.