Physical fatigue is a state of tiredness that occurs after prolonged physical activity or exertion. It can result from various factors, including intense exercise, lack of sleep, or insufficient nutrition. When the body is fatigued, muscles may feel weak, and overall energy levels decrease, making it difficult to perform daily tasks. This condition is a natural response of the body to protect itself from overexertion. Rest and recovery are essential for restoring energy levels and allowing muscles to repair. Chronic physical fatigue may indicate underlying health issues, so it's important to monitor symptoms and consult a healthcare professional if necessary.