TAYLOR & TAYLOR SPLIT

According to a new report, young sweethearts Taylor Swift and Taylor Lautner have split and The ENQUIRER can reveal one of the issues that put a wedge between them: diet and exercise.

Lautner is a health nut who works out religiously, two hours a day, five days a week, says the insider. He also follows an ultra-strict diet – eating six small meals a day, every two hours.

Swift, 20, hates the gym, takes only occasional yoga classes and would rather watch TV and order pizza or Chinese take-out.

“Unlike Lautner, Swift is anti-diet. Her favorite restaurant is the Cracker Barrel near her family’s Henderson, Tenn., home,” said the insider. “Her favorite dish is their biscuits and gravy – something Lautner wouldn’t touch with a 10-foot pole!”

The 17-year-old actor, who’s been practicing martial arts since age 6, pumped himself up with 30 pounds of muscle before filming the “Twilight” sequel, “New Moon,” which meant logging long hours in the gym and adhering to a high protein, calorie-intensive diet.

“Lautner is very athletic and health-conscious, so he eats mostly low-fat protein like skinless chicken breasts, egg whites and vegetables and fruits.

“But Swift loves cheeseburgers and has a major sweet tooth.

“Picking restaurants for date nights has turned into a huge headache and always leads to a squabble.

“The only food option they can agree on is sushi.”

The two dined at Japanese restaurants Benihana and Yamashiro on successive nights in Los Angeles in early December.