What is a consequence of high levels of metabolic heat during intense physical activity?

During intense physical activity, high levels of metabolic heat can lead to a significant consequence: the risk of overheating. When the body engages in strenuous exercise, it generates heat as a byproduct of increased metabolic processes, particularly in muscle tissue. If this heat is not dissipated effectively, it can raise the body's core temperature, leading to conditions such as heat exhaustion or heat stroke, which can be life-threatening.

To manage this heat, the body employs various cooling mechanisms, such as increased sweat production and enhanced blood flow to the skin. However, during prolonged periods of intense exercise, especially in hot and humid conditions, these mechanisms may become insufficient to prevent overheating, making this consequence a critical concern for athletes and those engaging in physical activities.

The other options, while they may have relevance in different contexts during exercise, do not directly relate to the risk posed by the buildup of metabolic heat in the same way.