CNN

Michelle Obama's appearances in sleeveless outfits have inspired some women to start toning their arms.

(CNN) - First lady Michelle Obama has a fashion following, with blogs tracking her daily garment choices.

She's on the March cover of Vogue in a sleeveless silk sheath. Then there was the purple sleeveless Narciso Rodriguez she wore to the president's joint session of Congress on Tuesday. And she's on the cover of the latest People magazine in a lacy pink number, also without sleeves.

Those toned arms are becoming a trademark. And a source of inspiration for some women.

Rylan Duggan, a personal trainer who runs Go Sleeveless, a blog that instructs women how to tone up flabby arms and "eliminate bat wings," said that in addition to asking how to get "Madonna arms" or "Kelly Ripa arms," clients are now asking about getting "Obama arms."

"The Obama effect has been that women of all ages have been inspired to take responsibility for their health and their body," said Duggan. "As the first lady of the United States, at 44 years old, and with two young children, Mrs. Obama has shown the world that you are never too busy to take care of yourself and look good doing it too," he said.

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