Patrick Schwarzenegger tweeted that he received stitches “down the back and but [sic]” after the accident, and he also thanked doctors who he said cared for him in Sun Valley.
He provided a link to a photo he posted to the social networking application Instagram, showing a deep cut on his lower back. He also said that he had been bruised in the accident, but he did not provide details on how he got injured.
A spokesman for Ms. Shriver did not provide further details.
In 2006, Arnold Schwarzenegger broke his leg in a ski accident at Sun Valley while he was governor of California.