Why aespa's Karina’s Sweat Suit Routine Might Be a Bad Idea for Your Health

As the weather cools down, more people are lacing up their sneakers and heading outdoors to exercise. With summer just around the corner, many are also kickstarting their weight-loss goals early. One workout trend gaining attention among fitness enthusiasts is the use of “sweat suits.”

A sweat suit is typically made from waterproof or windproof materials such as nylon or PVC. These non-breathable fabrics are designed to trap heat and increase perspiration, leading to an intense sweat session. Even K-pop star Karina of aespa mentioned in a YouTube appearance that she runs for four hours in a sweat suit and padded jacket to manage her fluctuating figure.

But does wearing a sweat suit really help you burn fat and lose weight?

💧 Sweating ≠ Fat Loss

Many people believe that the more they sweat, the more fat they burn. However, sweat has no direct correlation with fat loss. Sweat is simply the body's way of regulating temperature by releasing water through the skin. Most of the weight lost through sweating is water weight — not fat. Once you rehydrate after your workout, that weight typically returns.

While sweating can help release small amounts of toxins, it doesn’t meaningfully contribute to fat-burning or long-term weight loss.

⚠️ Risks of Electrolyte Imbalance

Sweat isn’t just water. It also contains vital electrolytes like sodium, potassium, chloride, and calcium. These substances are crucial for nerve function, muscle contractions, and fluid balance. Excessive sweating — especially from artificial heat like sweat suits — can lead to electrolyte imbalances, which may cause muscle cramps, headaches, dizziness, fatigue, and in severe cases, even heat exhaustion.

To avoid this, it's recommended to replenish electrolytes during and after workouts, especially by drinking sports drinks that contain essential minerals.

👕 Smarter Ways to Work Out

If your goal is to improve your fitness and lose weight sustainably, the best approach is to wear lightweight, breathable activewear and exercise in a cool, comfortable environment. Remember: the real purpose of exercise is to build stamina and support overall health — not just to sweat as much as possible.