it's about the genetic disorder Osteogenesis imperfecta.

Osteogenesis imperfecta Osteogenesis imperfecta (OI) is a genetic disorder characterized by bones that break easily, often from little or no apparent cause. There are at least four recognized forms of the disorder, representing extreme variation in severity from one individual to another. For example, a person may have just a few or as many as several hundred fractures in a lifetime (OI foundation). OI is caused by a genetic defect that affects the body's production …

…People with OI can lead a healthy life despite the restrictions they have. Doing mild exercise and eating right can help them live a healthier life. Works Cited Binder, Helga, MD, et al. "Rehabilitation Approaches to Children With Osteogenesis Imperfecta: A Ten-Year Experience" Arch Phys Med Rehabil 74 (1993). Isselbacher, et al. Harrison's Principles of Internal Medicine New York: McGraw Hill, 1994. OI Foundation: Osteogenesis Imperfecta Foundation: www.oif.org OIFE: Osteogenesis Imperfecta Federation Europe: www.oife.org