The current president of the United States has some false beliefs about physical fitness.
Most recently, there was this nugget of information from a New Yorker magazine story about the president. Trump "considers exercise misguided, arguing that a person, like a battery, is born with a finite amount of energy," writes Evan Osnos.
This belief is also described in the Washington Post's biography of the 45th president, which explains that he gave up sports after college because of this same mysterious "battery" belief, that working out would deplete his energy.
None of this is new for Trump, who said back in 1997 that he worked out "on occasion ... as little as possible."