Pro wrestling legend “Nature Boy” Ric Flair says he is “back up and running” after surgery Aug. 14.

Neither his representatives nor the WWE has released specifics of the surgery. His longtime girlfriend, Wendy Barlow, said Flair, 68, had “multiple organ problems.” Multiple reports have stated Flair had surgery on his bowels to remove an obstruction that had caused his kidneys to shut down.

Flair posted a 20-second video message on Twitter on Saturday that said, “To all my fans out there, let it be known worldwide the “Nature Boy” — Wooo! — is back up and running, looking as only as I can look. I want to thank all my fans out there for the love and support, and I will see you in the very, very, very, very, very, VERY near future. Wooo!”

Earlier in the week, in his first public comments, Flair tweeted, “Sometimes you have to get knocked down lower than you have ever been, to stand up taller than you ever were. Naitch WILL be back!” with a prayers emoji. Saturday’s post was the first video update.

Barlow wrote on Facebook this week that Flair was scheduled to begin physical therapy soon. He “will be stronger than ever and back out enjoying all the fans sooner than you would think. I can honestly say I have witnessed a miracle.”

Excerpts from Flair’s book with his daughter Ashley (aka WWE’s Charlotte) were printed in their hometown The Charlotte Observer. “Second Nature — the Legacy of Ric Flair and the Rise of Charlotte” will be released Sept. 19.