What is a key factor that contributes to a weight plateau after weight loss?

Adaptive thermogenesis is a significant factor that contributes to a weight plateau after initial weight loss. This phenomenon refers to the body's ability to adjust its energy expenditure in response to changes in body weight and composition. When a person loses weight, their basal metabolic rate (BMR) tends to decrease due to the loss of both fat and lean mass. The body adapts to this lower weight by becoming more energy-efficient, resulting in a decreased energy expenditure at rest and during physical activities.

As weight loss occurs, especially if it involves a significant reduction in caloric intake, the body enters a preservation mode where it conserves energy. This adaptive response can lead to challenges in continuing weight loss, even when a person maintains a calorie deficit. Therefore, this physiological mechanism is a primary reason individuals experience a plateau in weight loss after making initial progress.

Recognizing adaptive thermogenesis is crucial for developing effective weight management strategies post-weight loss, as it highlights the need for adjustments in dietary and physical activity plans to overcome this plateau.