The `Toxic` singer keeps to a strict workout regime in order to be in peak condition for performing on her current `Femme Fatale` tour and feels it goes beyond simply working out.
She told Britain`s Glamour magazine: "[Exercise] is a spiritual thing, it helps your mind and your body and it`s all connected. So, yes, I think it`s really important to take care of yourself in that way.
"I work out every other day, and sometimes every day. I run a lot on the treadmills in hotels when I`m on tour and I do light weights and a little bit of cardio."
However, Britney has also long been a fan of calorific treats and in the past has been known to go on junk food binges, which reportedly caused her to put on 14lbs in one month during her 2009 `Circus` tour.
A source said at the time: "She does not think about the calories in the food, just that she likes it. She loves greasy food and creamy sweets and hates fruit and vegetables."
To regain her figure, the singer subsequently put herself on a 1,600 calorie-a-day diet.