Many with Scheuermann's disease often have an excessive lordotic curve in the lumbar spine; this is the body's natural way to compensate for the kyphotic curve above. Many with Scheuermann's disease have very large lung capacities and males often have broad, barrel chests.
Many individuals with Scheuermann's disease display an excessive inward curve in their lower back (lordotic), as a way to counter the outward curve of their upper spine (kyphosis).  Those with Scheuermann's disease frequently have large lung capacities, and males often have broad chests.