Al Roker, 70, says he didn't stop eating his favorite foods — including red meat and dessert — to lose weight

Al Roker underwent a gastric bypass surgery in 2002 and lost over 100 pounds after.

Nathan Congleton/NBC

• "Today" host Al Roker says consistency and discipline help him stay fit at 70.
• Roker's routine includes weight training, walking 10,000 steps a day, and not avoiding his favorite foods.
• "Sometimes you have to push yourself to do the things you need to do," he said.

More than 20 years after undergoing gastric bypass surgery and losing over 100 pounds, Al Roker says consistency helps him stay fit at 70.