ZE:A's Dongjun injured his back during MBC's 'Idol Star Olympics'.

During part 2 of MBC's 'Idol Star Olympics' which aired on July 26th, Dongjun had slipped a little at the start of his�110m hurdle race, however, his competitive nature got the best of him and he jumped the hurdle regardless, causing injury to his back. Despite the pain, Dongjun powered through to finish the race.

After the race came to an end, Dongjun was escorted out with the help of a representative, and the singer had to unfortunately forfeit the 100 meter dash. "I was so nervous and fired up that I caused injury to myself," Dongjun said. "It's unfortunate because I wanted to participate in the 100 meter dash. I'm sorry."

Because of injuries like Dongjun's, the safety of these competitive and athletic variety programs are once again being questioned.

In related news, 2AM's Changmin, TEEN TOP's Niel, ZE:A's Kim Dongjun, SHINee's Minho, Boyfriend's Donghyun, 2AM's Lim Seulong, INFINITE's Woohyun, and Dalmatian's Simon participated during the 110m hurdle race. In the end, it was SHINee's Minho who took home the gold medal.

Source & Photo: Newsen via�Nate