What is the underlying factor for rapid weight loss?
Emilia Szymańska
2026-03-18
4 min. read
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Few individuals value abrupt transformations, even if they are enhancements. We necessitate time to adapt and prepare for new conditions. Our bodies function analogously. When we gain weight, we instigate a series of metabolic and hormonal alterations that necessitate time to revert to normalcy. Not to mention skin stretching, which when we lose weight swiftly becomes loose and sags. Even in the future, when our bodies express gratitude for shedding excess pounds, we must grant them time to acclimate to calorie deficit, superior nourishment, and physical exertion.
The correct speed for weight loss
On average, a weight loss of about 0.5 kg per week is considered healthy. However, in the first few weeks, the decline is often more significant because we lose excess water in the body due to dietary changes or regular exercise. However, if the pace is too fast, this can indicate a too large caloric deficit or excessive training intensity. Hunger, or even a famous diet of about 1000 calories, will not bring long-term results. Despite initial determination, such strict calorie restrictions eventually lead to overeating. It is important to remember that every muscle requires energy to work, even those used during breathing. To estimate the appropriate caloric deficit, one must calculate their BMR (basal metabolic rate), taking into account physical activity and work style (sitting, standing, physical), and then subtract 10% from the calculated calorie amount. If you feel good and your energy level does not drop drastically, you can slightly deepen the deficit. However, after reaching the desired weight, it is also important to gradually return to your daily needs. This method is an approximation because it is not possible to definitively determine the metabolic rate and the amount of calories burned during a specific activity. Therefore, it is important to observe the body and control weight.
Training adjustment
If we haven't been physically active for most of our lives, prolonged two-hour workout sessions, seven days a week, can lead to extreme muscle loss. The first symptom is painful acidic sensations caused by the production of lactic acid in the muscles. There will be general weakness, lack of motivation to exercise, decreased muscle strength, and long-term loss of regenerative ability that will lead to muscle protein breakdown. Instead of losing fat, weight will be lost from muscle mass. This not only has negative effects on muscle productivity, but also disrupts the functioning of the entire body. This leads to an increased production of stress hormones, particularly cortisol, which makes the process of fat reduction more difficult. Therefore, it is important to tailor the training to our current physical capabilities. Even if we only train three times a week, but effectively and allow enough time for recovery, changes and a boost in metabolism will be quickly noticed.
Adipose tissue fulfills numerous roles apart from energy provision
Adipose tissue is an indispensable component of our body that fulfills multiple functions. It provides protection against hypothermia, produces hormones, and stores toxins. However, rapid weight loss can result in an unexpected release of toxins that have accumulated over the years in our adipose tissue and are now entering the bloodstream. This can lead to serious health complications, including death. Therefore, it is of paramount importance to consume large quantities of water during weight loss, which aids the body in eliminating toxins.
Profound nutritional deficiencies
When implementing a diet, we present a calorie deficit, yet it often also leads to deficiencies in individual nutrients such as macronutrients and micronutrients. A significant reduction in fat consumption is frequently observed, as fats are the richest source of calories. However, such behavior can be dangerous, as fats are necessary for the absorption of vitamins A, D, E, K, whose deficiency can result in harmful health consequences such as weakened immunity, lack of protective antioxidant and anticancer effects, impaired vision, and increased blood clotting. Unsaturated fats are essential for hormone synthesis and cell membrane formation, as well as brain development. Their deficiency can have a negative impact on skin appearance, which is particularly important during weight loss. Monotonous diets based on a few nutrients can lead to deficiencies in other vitamins and minerals that are vital for our body. It is worth ensuring an adequate intake of B-group vitamins that promote weight loss by consuming whole grain products and bran. In a reducing diet, the variety of foods and unprocessed foods are most important - no elimination diet will bring long-term benefits.
