What effect does performing intense aerobic activity while dieting have on muscle tissue?

Performing intense aerobic activity while dieting can lead to muscle tissue loss due to several physiological mechanisms. When the body is subjected to a calorie deficit, as is the case during dieting, it seeks energy from available sources. If the intake of protein and overall calories is not sufficient to maintain muscle mass, the body may begin to break down existing muscle tissue for amino acids and energy.

Intense aerobic activity further amplifies this effect. During prolonged, high-intensity exercise, the body may prioritize immediate energy needs over muscle preservation, especially when there is inadequate nutritional support. As a result, without proper dietary intake that includes sufficient protein and calories to meet both the demands of exercise and the needs for tissue maintenance, muscle catabolism can occur.

This process highlights the importance of balancing exercise and nutrition. To minimize muscle loss, individuals engaging in intense aerobic activities while dieting should prioritize a diet high in protein and ensure they are not in an excessive calorie deficit.