Which of the following is NOT a sign of fatigue during exercise?

In the context of exercise physiology, fatigue typically manifests through various physical and mental signs indicating that the body is becoming unable to sustain the current level of activity. Increased energy levels, in contrast, suggest that the body is functioning optimally and is well-prepared to handle the demands of exercise. When someone feels more energized, it usually means they are not experiencing fatigue.

Other signs of fatigue, such as a breakdown in proper form, excessive sweating, and dizziness, indicate that the body is under stress and beginning to tire. A breakdown in proper form may occur as muscles tire and coordination diminishes, excessive sweating can reflect the body’s attempt to cool itself in response to exertion, and dizziness can signify a drop in blood flow or changes in oxygen levels. Therefore, increased energy levels distinctly stands out as it contradicts the expected symptoms of fatigue during physical exertion.