Is fast food, 4-5 hours of sleep the secret of 78-year old Donald Trump's fitness?

At 78, Donald Trump is one of the oldest contenders of the US President post. The US President contender, who was also the 45th President of the US, has a typical daily routine. At over 70 years old when he took office, Trump’s fitness and diet were often topics of media speculation and public curiosity. While not known for following a traditional health-conscious routine, Trump’s habits offer insight into his personal approach to fitness and diet.His lifestyle combines elements of his preferences for fast food and specific eating habits with a more casual approach to exercise.
Now, it is obvious to wonder, how does he stay active and alert at this age.
He starts his day before 6am mostly, but prefers to skip his breakfast.
Regarding his diet, Trump is a fast-food lover. He loves a well-done steak, and fried chickens. Trump can drink as many as 12 diet cokes in a day. As per reports, during his Presidential stint Trump had a little red button on his desk and would ask for soda.
As per a book co-authored by Corey Lewandowski, Trump's usual dinner consisted of two Big Macs, two Fillet-O-Fish, and a chocolate malted.

He had a special liking for fast food because he thinks it leaves less chance of anyone tampering the food. He had a longtime fear of being poisoned, one reason why he liked to eat at McDonald’s—nobody knew he was coming and the food was safely premade,” according to an excerpt in the book Fire and Fury.
When it comes to physical exercise, Trump does not put much effort into that. ‘All my friends who work out all the time, they’re going for knee replacements, hip replacements—they’re a disaster,’ he had told the NY Times recently.
Trump’s exercise primarily consists of activities that are part of his daily routine rather than structured workouts. Golf, for example, is one of Trump’s favorite pastimes, and he is known to spend considerable time on the golf course. While golf itself is not considered strenuous, walking the course and swinging clubs can provide a moderate form of physical activity. Trump has owned and played on various golf courses around the world, and it is said that he plays regularly, which allows him to maintain some level of physical movement.
A big germaphobe, Trump does not even let the housekeeping pick the shirt off the floor. He avoids physical contact and keeps it as minimal as possible.