Gymnastics is a rough sport. We have a lot of injuries, it’s true.
… studies have suggested that the rate of injury in gymnastics is almost as severe as that in contact sports. For every 10,000 children doing gymnastics each year, 52 will need hospital treatment compared with 75 young rugby players. …
But this new study from data collected by Jerry Dwek at the University of California, San Diego article is over the top, in my opinion:

… In the report to be presented today at the annual meeting of the Radiological Society of North America, researchers noted that the gymnasts studied showed a “broad constellation of recent injuries†to their wrists and knuckles and evidence of early necrosis, or “deathâ€, of bones.
Using magnetic resonance imaging and other scans, the researchers studied the wrists and hands of 125 child gymnasts …
Young gymnasts risking a life of pain in quest for perfection – Times Online
Necrosis?
I don’t believe that for a second.
Will Dr. Dwek mention all the benefits of increased bone density due to gymnastics training along with the injury results?
related: Gymnastics Rescue – Wrist Injuries and Gymnastics
