Which of the following factors is NOT associated with increased iron requirements among athletes?

Increased iron requirements among athletes can be influenced by several factors, including physiological changes and losses associated with intense physical activity. The correct answer points to high-energy meat intake as not being associated with increased iron requirements.

This is because meat, particularly red meat, is a significant source of heme iron, which is easily absorbed by the body. Athletes who consume higher amounts of meat may actually benefit from the iron provided in their diet, thus potentially mitigating the risks associated with increased iron requirements due to their training or performance demands.

In contrast, increased breakdown of red blood cells during strenuous exercise can lead to a higher demand for iron since iron is a critical component in hemoglobin. Similarly, athletes may experience iron loss through sweat and urine, particularly during prolonged endurance activities, further necessitating greater iron intake. Additionally, the myoglobin content in muscle is another factor that can raise iron needs because myoglobin, similar to hemoglobin, requires iron for its function in oxygen transport within muscles.

Thus, high-energy meat intake serves as a dietary support that could actually help meet iron needs rather than contribute to an increased requirement.