This document defines kyphosis as an excessive backward curvature of the spine localized to the thoracic spine, known as a "rounded back" posture. It can be caused by conditions like arthritis, tuberculosis, or postural habits. Kyphosis is classified by severity from first to third degree based on effects like muscle imbalance or vertebral wedging. More severe kyphosis can compress spinal structures and restrict breathing. Rehabilitation focuses on stretching, strengthening, bracing, and manual mobilization to reduce the curvature and its impacts. Studies show manual mobilization and techniques applying passive transverse forces can help attenuate thoracic kyphosis, especially in elderly patients with osteoporosis.