Madonna is turning physical exercise into a driving obsession. The nearly 50 year old pop star is getting buff enough to be frightening to other people on the streets. We’ve got a couple of pictures of Madge heading back to her car after a workout session with her personal trainer Tracy Anderson.

The singer is either mindful of the camera and squeezing those upper arms for effect or she really has gotten muscle bound. Her shoulders and upper arms sure look like she might be dabbling in some kind of body building potion. Whatever she’s doing, she looks like she can whip her weight in wildcats.

For more pictures of Tracy Anderson and Madonna - click here. Check out another photo after the jump.

Check out the muscular photos at Daily Mail.

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Filed under: Celebrities, Madonna