New Jersey Gov. Chris Christie says undergoing gastric bypass surgery more than a year ago was a "life-changing decision."
Appearing on his monthly TownSquare Media radio show Wednesday night, Christie says he works out four days a week and has achieved better health.
The 51-year-old governor hasn't said how many pounds he's shed, but he has become noticeably thinner since secretly undergoing the surgery last February.
He says he enjoys riding a stationary bike but does not like doing side-lift exercises with dumbbells.
The possible 2016 Republican presidential candidate has said he's struggled with being overweight his entire adult life.
Christie also said on the show that he has not ruled out running for president in 2016 despite his aides' involvement in a traffic-blocking plot that has engulfed his administration.
He says that nothing that has happened "would make me think any differently about my ability to pursue that job or to perform in it.
He had been considered an early front-runner for the Republican nomination, but his ranking has slipped since the scandal broke.
Christie says he did not know about the political payback plot orchestrated by his aides, who blocked traffic near the George Washington Bridge linking his state with New York City, apparently to punish a Democratic adversary.
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