'K-Celeb Fitness' How Kazuha, Momo, and Lee Sung-kyung Sculpt Their Bodies

As the weather cools and layers come off, interest in fitness and body toning is heating up again. Among the most admired features?

The defined abs of female K-stars—a symbol of dedication and discipline. While building abs may seem like a long and difficult journey, these stars prove that even simple workouts can lead to impressive results. Here’s how they do it.

1. LE SSERAFIM's Kazuha: 7-Minute Abs Routine

Kazuha has earned the nickname, “a goddess face with a warrior’s body,” thanks to her graceful visuals and chiseled abs. On LE SSERAFIM’s official YouTube channel, she shared her personal 7-minute workout routine.

One of her go-to moves is the side crunch, a core-strengthening exercise that targets the external obliques (the side muscles of your abdomen). To do it:

1. Lie on your back with knees bent and feet flat on the floor.

2. Place your hands behind your head or crossed on your chest.

3. Twist your upper body as you bring one knee toward your chest.

4. Return to the starting position and repeat on the other side.

This simple move, done consistently, helps tone the waistline and define side abs.

Momo is famously disciplined and consistently showcases her sharp “11-line” abs. On JTBC’s Idol Room, she revealed her secret weapon: the twist plank.

This variation of the standard plank involves Holding a plank position with your forearms and toes supporting your body, Keeping your hips steady and off the ground, and twisting your lower body side to side, engaging the core throughout.

Momo reportedly performs multiple sets of 50 reps, demonstrating just how much dedication she puts into her routine.

Actress Lee Sung-kyung recently stunned audiences by revealing her six-pack abs in the musical Aladdin, where she wore midriff-baring outfits. She said the role motivated her to focus even more on ab training—especially targeting the transverse abdominis, the deep core muscle that wraps around internal organs.

This muscle can be activated through deep breathing exercises. Inhale slowly, expanding your lower abdomen deeply (not just the belly). Exhale slowly while pulling your stomach inward toward your spine, as if tightening around your organs.

Do this for 5 seconds in and 5 seconds out, repeating about 10 times. This breathing-focused move may look simple, but it can significantly strengthen your core and reduce visceral fat when done regularly.

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