Oh, so this is how Ashley Olsen keeps her enviably fit physique.

Ashley took advantage of the perfect New York weather this weekend and worked out outdoors at Battery Park.

The petite 26-year-old dressed appropriately in short black spandex and a loose-fitting tank top and sneakers, and accessorized with dark sunglasses. Olsen, who seemed to be by herself -- sans twin sister Mary-Kate and with no trainer in tow -- tied her flowy blond locks in a low bun.

The child star-turned-fashionista recently made an appearance at the Met Gala, wearing a large orange gown befitting her bohemian style.

Olsen was spotted a day after working up a sweat all the way across the country, in Beverly Hills, Calif., with a mystery man rumored to be of romantic interest. Show 'em how it's done, Ash!

PHOTOS:

ashley olsen works out

ashley olsen works out

ashley olsen works out

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