True or False: Lean muscle tissue is more metabolically active than fat tissue.

Lean muscle tissue is indeed more metabolically active than fat tissue. This means that it requires more energy to maintain muscle than it does for fat, leading to a higher basal metabolic rate (BMR) in individuals with greater muscle mass. As a result, people with more lean muscle will burn more calories at rest compared to those with a higher percentage of body fat. This is an important consideration in weight management and fitness, as increasing lean muscle through exercise can help enhance overall metabolism and promote better weight control.

In contrast, fat tissue has a lower metabolic activity and does not require as much energy to sustain itself. Thus, this fundamental difference in metabolic activity plays a significant role in how the body uses energy and responds to dietary changes or exercise. The statement that lean muscle is more metabolically active than fat is supported by extensive research in exercise physiology and nutrition.