Kyphosis is an exaggerated forward curvature of the upper spine that creates a rounded or hunched appearance in the upper back, ranging from mild postural changes to more significant structural curves.
What kyphosis involves and how it affects how you feel
Some degree of outward curve in the upper back — the thoracic spine — is normal and necessary. Kyphosis refers to a curve that has become more pronounced than typical, either because of posture patterns, muscle imbalances, vertebral changes, or conditions like osteoporosis that cause the front of the vertebrae to compress. In postural kyphosis, which is the most common type, the curve is flexible — it can be corrected voluntarily — and is typically driven by habits like prolonged sitting, forward head posture, and weak upper back muscles. A more pronounced kyphosis can limit how far you can lift your arms overhead, contribute to neck pain and upper back stiffness, and affect breathing by reducing chest expansion. Over time, a structural kyphosis involves changes to the vertebrae themselves and is less responsive to postural correction alone.
Why kyphosis is often accepted rather than addressed
Many people are told they have a rounded back and assume it's simply a posture issue to be self-corrected through effort. The more useful framing is that kyphosis reflects a pattern of muscle imbalance and joint stiffness that responds well to targeted physical therapy — particularly work that combines thoracic mobility with strengthening the muscles that extend and support the upper spine.
Why "stand up straight" doesn't fix it
Telling someone to correct their posture doesn't give them the muscular capacity to sustain that correction. The muscles that hold the thoracic spine in a more neutral position — particularly the mid and lower trapezius and the thoracic extensors — need to be specifically strengthened for any postural change to hold beyond a moment of concentrated effort.
How Sword Health can help
A physical therapist can assess your thoracic spine mobility, identify the muscle imbalances contributing to your kyphosis, and build a program that creates lasting change rather than temporary correction. Sword makes that care available from home, with expert guidance at every stage.
About the author
Carolina Moreira
Medical Director of Clinical Development at Sword Health
