Rainbow's Jaekyung and Hyunyoung starred in "Secret Body Terminators" for the January issue of Ceci.

The celebrity duo proudly showed off their athletic physiques while posing with dumbbells and boxing gloves. According to the magazine, "Jaekyung and Hyunyoung know how to create a healthy body line. Their body secret is surprisingly simple. Eat well, exercise properly!"

As for their wardrobe, Hyunyoung mainly modeled active-wear by Forever 21. Among her affordable apparel pieces there was lace-up faux leather shorts. The shiny shorts have lace-up accents on either side, can be yours HERE and can be seen below.

Meanwhile the star's accessories included the "HE909WH" earrings by Gemma Alus. The triangular studs are made of glass cut stones, brass and faux pearls. The pair can be yours HERE and can be appreciated below.

Jaekyung's combinations included the "Interlock" running shorts by American Apparel. The brand describes the shorts as "a modern take on the classic 70's running shorts." The cotton bottoms can be yours HERE and can be seen below.

In other fashion news, Jaekyung recently supported the Committee of Preventing Animal Abuse with a special pet-owner photoshoot in InStyle.

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About the Author: Elsa is the founder, head writer, and editor of KPopBreak.com. In her website, she covers K-pop celebrity style, Korean actress beauty trends, red carpet appearances and Seoul Fashion Week news.