“A week or two ago, I went to a steakhouse and ordered a steak and ate about a third of it and I was full,” he told the Post.
Christie declined to say how much weight he has lost since the surgery.
The Republican governor is running for a second term in November, although his name is often mentioned as a possible presidential candidate.
“I know it sounds crazy to say that running for president is minor, but in the grand scheme of things, it was looking at Mary Pat and the kids and going, ‘I have to do this for them, even if I don’t give a crap about myself,'” he said.
Gastric band surgery is pitched as a minimally invasive procedure. One version of it is sold under the brand name Lap-Band. Its website says the surgery is appropriate for adults who have failed with more conservative alternatives, such as diet and exercise.