Britney Spears views exercise as a spiritual thing as exercise helps the mind as well as the body.

"[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," Contactmusic quoted her as telling Britain's Glamour magazine.
"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," she added.
Source-ANI