Tom Brady's longevity over the years has mostly been down to how healthy he has kept himself. That at 45, he is not only the greatest of all time, but still playing at the highest level is otherwise unimaginable. In the 2020 season, Brady was the Super Bowl MVP as he won his seventh Lombardi Trophy and his first with the Tampa Bay Buccaneers.
None of this would be possible without keeping himself fit. A key component of that is his weight. Eating and exercising properly are good ways to maintain a healthy body weight. When Tom Brady was drafted, he weighed 211 pounds. Today, he weighs 225 pounds. Considering he has played for more than 22 years in the league, it has been a long time to maintain such a near-constant weight. Anybody who has struggled with weight gain after their twenties can easily relate.