Kyphosis is an exaggerated rounding of the upper back, in more severe cases, known as hunchback.
This can be bone structure, and can be genetic. But, often it is functional, due to slouching or poor posture, and the weakening of your spine and the deep postural muscles close to the spine.
Through various yoga therapy techniques, we can work to strengthen the deep muscles and encourage the spine to become more upright, improving overall posture.