Which of the following is a sign of overexertion during exercise?

The presence of unusual pain or excessive fatigue serves as a clear indicator of overexertion during exercise. When a person is engaging in physical activity, it is essential to monitor their body's signals. Normal signs of exertion may include an increased heart rate or some fatigue, but unusual pain or an overwhelming sense of tiredness suggests that the individual has pushed beyond their current capacity. Such signals are important as they can lead to injury or exacerbate existing health conditions if not heeded.

In contrast, increased energy and excitement, improved mood and relaxation, and enhanced focus and concentration are typically positive responses associated with exercise. They indicate a healthy engagement with physical activity rather than an indication of overexertion. Thus, recognizing unusual pain or excessive fatigue is critical for ensuring safe and effective exercise, particularly for individuals managing arthritis or other similar conditions.