Details on the preparation of Spears for her tour!

For most people, the idea of working out for more than six hours per day may sound like torture.

But Britney Spears can not get enough. In the last six weeks, she has spotted 90 minutes per day, followed by a routine five-hour dance rehearsals in preparation for its tour North American, which begins on June 16 in Sacramento.

"I'm excited!" Spears told PEOPLE in her cozy dressing room at the Sony Studio in Culver City, California. "We have worked hard and the costumes will arrive next week. This is the most exciting part, when all the pieces - the masterpiece - come together."

During the months of preparation for Spears, coach Derek DeGrazio appointed oq she can eat in your meals (such as cooked fish and broccoli) and snacks (like celery with almond butter) for six days a week.

Despite all the discipline, she has a rest. On Sunday, Spears said, is the day to "get out of the routine."

But certainly not that special day undermines their efforts. The exercises of Spears and her diet of 1,500 calories a day left in order to tour. 

"You can see the definition in their muscles - arms, legs and abdomen", said DeGrazio. "She's incredible."

The new issue of People magazine on newsstands in the United States on Friday (20). The magazine promises more photos of the singer rehearsing in the printed version.