Democratic presidential candidate Bernie Sanders said Wednesday that he “misspoke” when he told reporters he may slow his frenetic campaigning pace after a recent heart attack.

The Vermont senator backtracked in an interview with NBC News just a day after indicating that health concerns would force him to change “the nature” of his campaign, in the short term, at least.

“We’re going to get back into the groove of a very vigorous campaign,” Sanders told NBC.

The 78-year-old self-described democratic socialist was hospitalized after experiencing chest discomfort while campaigning in Las Vegas last week. His staff initially said two stents were inserted for a blocked artery in his heart. Two days later, they revealed he had a heart attack.

Sanders told NBC it was “nonsense” to suggest his staff hadn’t been forthright about his condition. He said he was still talking to doctors and trying to understand what was going on.

The focus on Sanders’ health comes as age plays a significant role in the 2020 presidential campaign. Should he win the Democratic presidential nomination, he would be the oldest person ever elected. So would his 76-year-old Democratic rival Joe Biden.

Sanders’ apparent reversal is at odds with one of his national co-chairs Nina Turner, who said in a Tuesday interview that the campaign was examining where and how to make changes to reflect concerns about the senator’s health.

Sanders has been among the most aggressive campaigners in the Democratic race, sometimes making multiple campaign appearances each day on multiday campaign swings through key states across America.

While Sanders had campaign appearances scheduled for the coming days, Sanders’ wife, Jane O’Meara Sanders, said Wednesday that he would stay in Vermont until next week’s debate.

(AP)