Group Nine Muses revealed the secret to their thin and fit bodies through a picture of themselves doing antigravity yoga.

Today, Nine Muses posted a picture of themselves doing antigravity yoga on their Twitter, highly recommending it to women in their 20s and 30s.

Antigravity yoga is doing yoga while hanging from the ceiling by feet. Because it utilizes the rope that hangs down from the ceiling, it's more challenging than regular yoga and it is a greater help in stretching or in building muscles.

Nine Muses is currently working with their new song "WILD."

Photo Credit: Nine Muses Twitter