USMLE Tutorial - Conjugate Gaze Explained - Duration: 7:52. USMLESuccessAcademy 75,103 views
A scoliosis curve can be C- or S-shaped. In severe cases, the spine will rotate and twist, causing the ribs to stick out more on one side. Most cases of scoliosis are mild and cause no health problems. In severe cases, the twisting of the spine and ribs reduces space within the chest cavity. This can interfere with breathing and put strain on the heart. Untreated scoliosis can also compress and damage the spinal nerves, leading to paralysis.
Surprisingly the answer to your question is quite involved. I will answer it from a freedivers point of view. First of all, holding your breath has different effects depending on what circumstances you do it under. When you exercise normally your breath will increase as a response to the increased levels of CO2 in your blood.