Rib Flare and Thoracic Breathing: How Upper Rib Cage Stiffness Inhibits Deep Core Contraction

The Short Answer An outward-flaring lower rib cage or stiff upper back can make it significantly harder to engage your deep core muscles—such as the transverse abdominis and pelvic floor. While rib flare does not permanently “block” or “paralyze” your core, it disrupts the mechanical alignment between your main breathing muscle (the diaphragm) and your … Read more

Why Traditional Crunches Worsen Lower Abdominal Pooch After Childbirth (Intra-Abdominal Pressure Dynamics)

The Short Answer Traditional crunches do not directly create permanent structural damage, but they frequently exaggerate a lower abdominal “pooch” or doming after pregnancy. This happens because a crunch sharply increases intra-abdominal pressure while flexing the spine. If your post-pregnancy abdominal wall (linea alba) and pelvic floor are not yet coordinating or managing that pressure effectively, the … Read more