Jakarta – The pursuit of an ideal body weight is a common aspiration for many, yet achieving and maintaining it can present significant challenges. Faced with time constraints or a simple disinclination towards physical activity, a prevalent approach involves restricting dietary intake without incorporating exercise. While this method might yield initial weight loss, a leading nutrition specialist has sounded a crucial warning about its potential health repercussions.
Dr. Igus Ulfa Yaze, SpGK, a clinical nutrition specialist, explained during a live TikTok session with detikHealth on Thursday, July 9, 2026, that while weight reduction might occur through dietary restriction alone, the primary concern lies in the potential loss of muscle mass. "So, if someone wants to get thinner but doesn’t exercise, their weight can go down, but what we worry about is that their muscles will go down too. If the muscles also decrease, they will usually look saggy and wrinkled," Dr. Yaze stated.
The expert emphasized that during a weight loss regimen, maintaining stable muscle mass is paramount. The goal should be to reduce body fat, not muscle tissue. The decline in muscle mass, a vital component of overall health and metabolism, can trigger a cascade of negative health outcomes. These can range from disrupted sleep patterns to a compromised immune system, significantly undermining the body’s ability to function optimally.
The Critical Role of Muscle Mass in Weight Management
Muscle tissue plays a far more active role in metabolism than fat. It burns more calories at rest, meaning that a higher muscle mass contributes to a higher basal metabolic rate (BMR). When muscle mass declines, the body’s overall calorie expenditure decreases, making it harder to sustain weight loss and easier to regain weight. This phenomenon can lead to a frustrating plateau, often referred to as "getting stuck," where individuals feel their efforts are no longer yielding results, potentially leading to discouragement and abandonment of their weight loss goals.
"If possible, with exercise, muscles will increase. Don’t let fat decrease while muscles also decrease. Because that can cause a decrease in the body’s immunity," Dr. Yaze elaborated. She further explained that a loss of muscle can negatively impact various bodily functions. "It can disrupt, for example, sleep quality, it can also disrupt, for women, their feminine hormones. So, muscles are important, therefore, what needs to be reduced is fat," she added.
Understanding the Risks of Muscle Loss
The implications of losing muscle mass extend beyond aesthetic concerns. Muscle is intrinsically linked to strength, mobility, and metabolic health. As individuals age, a natural decline in muscle mass, known as sarcopenia, can occur. However, poor nutrition and lack of physical activity can accelerate this process, leading to frailty, increased risk of falls and injuries, and a diminished capacity for daily activities.
Furthermore, muscle plays a crucial role in glucose metabolism. Insulin sensitivity, the body’s ability to use glucose for energy, is higher in individuals with more muscle mass. A reduction in muscle can therefore contribute to insulin resistance, a precursor to type 2 diabetes.
The notion that weight loss achieved solely through diet is a sustainable or healthy path is being increasingly challenged by medical professionals. While calorie deficit is fundamental to weight loss, the composition of that weight loss is critical. A balanced approach that prioritizes fat reduction while preserving or building muscle is considered the gold standard for long-term health and well-being.
The Interplay Between Diet, Exercise, and Hormonal Balance
Dr. Yaze’s warning about potential hormonal disruption, particularly in women, highlights another critical aspect of the diet-exercise relationship. Hormones like estrogen, which play vital roles in reproductive health, bone density, and mood regulation, are influenced by body fat percentage and overall health. Extreme calorie restriction without adequate nutrient intake and muscle support can lead to hormonal imbalances, affecting menstrual cycles, fertility, and even increasing the risk of osteoporosis later in life.
The body perceives significant calorie deficits without sufficient fuel for muscle maintenance and repair as a state of stress. In response, it may reduce the production of certain hormones to conserve energy, leading to the aforementioned disruptions. Exercise, on the other hand, can help regulate hormone levels, improve insulin sensitivity, and promote the release of endorphins, contributing to both physical and mental well-being.
A Broader Health Perspective: Beyond the Scale
The conversation around weight loss often becomes narrowly focused on the number on the scale. However, health professionals increasingly advocate for a more holistic view. This includes factors such as body composition (the ratio of fat to muscle), metabolic health markers (like blood sugar and cholesterol levels), energy levels, sleep quality, and mental well-being.
A diet that leads to significant muscle loss, even if it results in a lower weight, may not necessarily translate to improved overall health. In fact, it could be detrimental. The wrinkled appearance Dr. Yaze mentioned is a visual manifestation of reduced subcutaneous fat and muscle tone, but the internal consequences can be far more serious.
Supporting Data and Expert Consensus
Numerous scientific studies underscore the importance of muscle mass in metabolic health and longevity. Research published in journals like the Journal of Gerontology and the American Journal of Clinical Nutrition consistently highlights the negative health outcomes associated with sarcopenia, including increased mortality rates and a reduced quality of life.
The general consensus among health organizations, including the World Health Organization (WHO) and national health institutes, emphasizes a comprehensive approach to weight management that integrates balanced nutrition with regular physical activity. This approach is recognized for its effectiveness in promoting sustainable weight loss, improving cardiovascular health, reducing the risk of chronic diseases, and enhancing overall physical and mental functioning.
The Long-Term Implications of a "Diet Only" Approach
The potential for a "stuck" phase, as described by Dr. Yaze, is a common experience for individuals who rely solely on restrictive diets. When the body adapts to a lower calorie intake by slowing down metabolism and losing muscle, further weight loss becomes increasingly difficult. This can lead to a cycle of yo-yo dieting, which has been shown to be less effective for long-term weight management and can even have negative metabolic consequences.
Moreover, the psychological toll of feeling perpetually unsuccessful can lead to disordered eating patterns and a negative relationship with food and exercise. This underscores the need for a sustainable and enjoyable approach that fosters long-term healthy habits rather than quick fixes.
Expert Recommendations for Healthy Weight Loss
To achieve healthy and sustainable weight loss, experts recommend a multifaceted approach:
- Balanced Nutrition: Focus on whole, unprocessed foods, ensuring adequate protein intake to support muscle maintenance and satiety.
- Regular Physical Activity: Combine cardiovascular exercise (aerobic activities) with strength training (resistance exercises). Strength training is particularly crucial for building and preserving muscle mass.
- Gradual Changes: Sustainable lifestyle changes are more effective than drastic, short-term measures.
- Adequate Sleep and Stress Management: These factors significantly influence hormonal balance and appetite regulation.
- Professional Guidance: Consulting with a registered dietitian or a qualified healthcare professional can provide personalized advice and support.
The warning from Dr. Yaze serves as a critical reminder that weight loss is not merely about reducing numbers on a scale. It is about achieving a healthier body composition, optimizing metabolic function, and enhancing overall well-being. Prioritizing muscle health alongside fat reduction, through a combination of appropriate nutrition and regular exercise, is the most effective and sustainable path to a healthier life. The consequences of neglecting muscle mass can be far-reaching, impacting not only physical appearance but also fundamental physiological processes and long-term health outcomes.
