Hyolyn Says 30 Squats a Day Will Change Your Body: Science Actually Agrees

Hyolyn went on MBC FM4U's Noon Hope Song Kim Shin-young on the 29th and, in response to a listener asking how many hours she trains to maintain her figure, gave an answer that was refreshingly un-influencer about it.

She's been too busy with comeback prep to get proper gym time lately, she said. So she does home workouts instead. The actual prescription she landed on: 30 squats a day, every day.

"You might think, 'will 30 squats today really change anything by tomorrow?'" she told listeners. "But it does. If you do it every day, your body will be different."

She went further, pushing back against the all-or-nothing mindset that kills most fitness routines. "Don't stress about how much you're doing. Just try to do even 20, consistently." Then the line that stuck: "Your body has memory. It doesn't forget quickly."

That last point is closer to science than it sounds. Exercise physiologists call this phenomenon muscle memory, and it's well-documented: trained muscle tissue retains structural adaptations longer than the fitness itself fades, which is why returning to training after a break is faster than starting from scratch.

More directly relevant to Hyolyn's advice is the concept of exercise snacking, which is exactly what it sounds like: short bouts of movement scattered through the day rather than one long session. A 2022 study from the University of British Columbia's School of Kinesiology found that even small, consistent doses of exercise improve cardiorespiratory fitness, muscular strength, and metabolic health over time.

The case gets stronger from a 2025 study out of Edith Cowan University in Australia. Researchers put sedentary adults on a five-minute-a-day bodyweight program for four weeks. The results were not trivial: thigh strength improved, push-up and sit-up performance went up, cardiorespiratory fitness and flexibility both got better, and mental health scores rose significantly. Five minutes. Four weeks.

Hyolyn's 30-squat benchmark is not some arbitrary number she pulled for radio. The research suggests the real variable is not volume but consistency, and that low-barrier habits are more likely to stick than ambitious ones. Her framing of it as a daily minimum rather than a workout target is, whether she intended it or not, fairly aligned with what sports science currently recommends for sedentary populations.

The broader point her appearance made, without making it too loudly, is that the gap between celebrity fitness and accessible fitness is sometimes narrower than assumed. Thirty squats is a low floor. The research says that might be enough to get through the door.