Kholidah
In a recent broadcast that has sparked significant discussion across South Korean media and international fan communities, Karina, the leader of the globally acclaimed K-pop group aespa, shared the grueling physical demands and extreme weight management techniques she utilized during her formative years as a trainee. Appearing as a featured guest on the July 12, 2026, episode of the popular JTBC variety program Please Take Care of My Refrigerator, the idol provided a rare glimpse into the high-pressure environment of the K-pop industry, where aesthetic standards often necessitate radical physical transformations in short periods.
The episode, which traditionally focuses on professional chefs creating gourmet meals from the contents of a celebrity’s home refrigerator, took an unexpected turn when Karina’s personal habits and history with weight management became the focal point of the conversation. While the chefs expressed initial surprise at the abundance and variety of food found in her fridge—challenging the stereotype that top-tier idols maintain restrictive diets at all times—Karina clarified that her relationship with fitness is defined by a highly reactive metabolism and a history of intensive physical labor.
The Reality of Trainee Weigh-Ins and Rapid Fluctuations
During the broadcast, Karina revealed that her body type is predisposed to rapid fluctuations, gaining and losing weight with unusual speed. This physiological trait became a critical factor during her pre-debut years at SM Entertainment. The K-pop trainee system is notorious for its rigorous evaluation process, which often includes scheduled weigh-ins to ensure that aspiring idols meet specific visual criteria set by management agencies.
Karina recounted a specific instance from her trainee days when she found herself four kilograms (approximately 8.8 pounds) over her target weight just twenty-four hours before an official weigh-in. "During my trainee days, I ate whatever I wanted, but when I weighed myself, I realized I had gained 4 kg," she explained to the stunned panel. Facing the pressure of a looming evaluation the following day, she felt compelled to take drastic measures to shed the weight immediately.
This revelation highlights the systemic pressure placed on young performers in the South Korean entertainment industry. For many trainees, failing to meet weight requirements can result in disciplinary action, loss of debut opportunities, or the termination of their contracts. Consequently, many resort to "emergency" weight loss methods that prioritize immediate numerical results over long-term physiological health.
The "100-Song" Routine: A Detailed Breakdown of the Method
To achieve the four-kilogram reduction in a single day, Karina detailed a regimen that combined extreme thermal exposure with prolonged cardiovascular exertion. The process she described involved several layers of clothing and an environment designed to maximize perspiration.
- Thermal Environment: Karina began by turning on the heater in the dance practice room to its maximum setting, creating a sauna-like atmosphere.
- Layered Attire: She donned multiple layers of heavy clothing, including leggings, a full sweatsuit, a hooded zip-up jacket, and a thick padded winter coat. This method is designed to trap body heat and induce profuse sweating.
- Extended Cardiovascular Exercise: In this attire, she ran and danced continuously for five to six hours. She used a playlist of 100 songs as a metric for her duration. Given that the average K-pop song lasts approximately three to three-and-a-half minutes, a 100-song cycle equates to roughly 300 to 350 minutes of high-intensity activity.
- Hydrotherapy: Following the exercise session, she returned home to take a hot bath for an hour, further encouraging the body to release retained fluids.
The panel’s reaction was one of visible concern and astonishment. MC Ahn Jung Hwan, a former professional soccer player who represented South Korea in the FIFA World Cup, immediately recognized the nature of her routine. He noted that the method Karina described was functionally identical to the "weight cutting" techniques used by professional athletes in combat sports, such as boxing or mixed martial arts (MMA), to meet weight classes before a fight.
Physiological Analysis and Health Implications
The loss of four kilograms in a single day is almost exclusively attributed to the loss of water weight and glycogen stores, rather than adipose tissue (fat). Medical professionals and nutritionists often warn against such practices due to the severe strain they place on the cardiovascular and renal systems.
According to sports physiology data, rapid dehydration of this magnitude can lead to a decrease in plasma volume, which forces the heart to work harder to circulate blood. It also carries risks of electrolyte imbalances, heat stroke, and acute kidney injury. While Karina’s youth and high fitness level at the time allowed her to recover, the long-term impact of repeated extreme dehydration is a subject of ongoing concern within the industry.
Karina herself acknowledged the physical toll of these methods during the JTBC broadcast. Now a seasoned professional in her mid-20s, she reflected on how her body has changed since her trainee days. "Doing this makes you feel totally drained," she remarked. "Now that I’m older, I can’t eat like that or exercise like that. These days, even rainy days make my body hurt." Her comments suggest a growing awareness of the physical "debt" incurred by the body after years of high-intensity performance and restrictive management.
The Evolution of aespa and the Changing K-pop Landscape
The context of Karina’s revelation is significant given aespa’s position as one of the most successful musical acts in the world. Since their debut in 2020, the group—consisting of Karina, Giselle, Winter, and Ningning—has redefined the "metaverse" concept in music, breaking numerous records on the Billboard charts and achieving "Perfect All-Kills" on South Korean music platforms.
As the leader of a group that serves as a role model for millions of young fans, Karina’s transparency regarding her past struggles with weight provides a dual narrative. On one hand, it confirms the "hard work" and "sacrifice" narrative often promoted by agencies; on the other, it humanizes the idol, revealing the vulnerabilities and physical costs associated with her success.
The industry at large has seen a slow but perceptible shift toward prioritizing artist health. In recent years, several high-profile idols have taken hiatuses for mental and physical health reasons, and agencies have begun to implement more robust wellness programs. However, Karina’s story serves as a reminder that the "emergency" culture of the trainee era remains a vivid memory for many active performers.
Industry and Public Reaction
The broadcast has elicited a wave of reactions from the public and industry insiders. On social media platforms, fans (known as "MYs") expressed a mixture of admiration for her discipline and heartbreak over the hardships she endured. Many comments highlighted the "inhumane" nature of the trainee system, calling for more sustainable practices in idol training.
Inferred reactions from health experts suggest a cautionary stance. While the "100-song" routine achieved its immediate goal, it is not a recommended practice for the general public. Modern fitness trends in South Korea are increasingly moving toward "healthy pleasure"—a concept that emphasizes sustainable dieting and enjoyable exercise over the "no pain, no gain" mentality of the past.
Furthermore, the involvement of Ahn Jung Hwan in the discussion provided a professional lens through which to view Karina’s actions. By comparing her to an elite athlete, he validated the intensity of her effort while also highlighting the "drained" state that such methods inevitably produce. His observation that he, too, can no longer sustain such physical extremes reinforced the idea that these are temporary, high-risk measures rather than sustainable lifestyle choices.
Conclusion: A Legacy of Resilience and a Call for Balance
Karina’s appearance on Please Take Care of My Refrigerator was more than a simple variety show segment; it was a candid look at the intersection of professional ambition and physical limits. By revealing the "secret" to her rapid weight loss, she did not offer a tip for fans to follow, but rather a testimonial of the lengths to which she went to achieve her dreams.
The implications of her story are twofold. For the K-pop industry, it underscores the need for continued evolution in how young talent is managed, ensuring that the stars of tomorrow are not sacrificing their long-term health for a moment on the scale. For the public, it serves as a sobering reminder of the reality behind the polished, "AI-like" visuals of modern idols. As Karina continues to lead aespa through their global tours and chart-topping releases, her openness about her past suggests a more mature, health-conscious approach to her career—one that values longevity and physical well-being as much as performance excellence.
