The former leader of girl group After School, Kahi, uploaded a photo of herself doing Pilates.

Kahi uploaded a photo on January 26th and tweeted, "Started exercising.� My butt hurts."

In the photo, Kahi is practicing Pilates wearing a training outfit that shows off her curves. Balancing precariously yet gracefully with her toes, she seems to be struggling to maintain her position.

Kahi is well-known for being a fitness aficionado, not only doing Pilates but also jogging, cycling, and horseback riding as well as partaking in many recreational sports to keep her body fit.

Netizens who saw the photo commented, "So that is how you maintain your body", "Wow, amazing", and "Are you really 34 years old?"

Source: Kahi's Twitter