Madonna is adopting a new exercise regime to “tone down” her shockingly sinewy arms.

Spotted@Daily Mail UK

After a year of lifting weights on a program usually used by dedicated bodybuilders, the “4 Minutes” star, almost 51, is ready for a new look.

“It’s Madonna’s birthday next week and she’s showing no signs of taking it easy,” a source told Britain’s Grazia Magazine. “There aren’t many women her age who have a body like that but even Madonna may have to admit this time she might have to tone it down.”

“She asked her trainer Tracy Anderson what she could do to stop her arms looking so sinewy. Tracy told her to do more stretching exercises to make them look leaner and Madonna has decided to follow her advice.”

Despite her change of routine, some friends believe Madonna secretly likes the muscular definition of her arms.

“I think that, aesthetically, there’s a big part of her that likes the way her arms look. It shows she’s in control,” the source added.