Signs of muscle overtraining include persistent fatigue, decreased performance, and prolonged soreness. Individuals may experience a lack of motivation and an increased susceptibility to injuries. Other symptoms include disrupted sleep patterns and changes in appetite. Emotional signs can manifest as irritability and mood swings. It's essential to recognize these indicators, as overtraining can lead to costly setbacks in physical progress. Allowing the body adequate recovery time, evaluating workout intensities, and ensuring proper nutrition and hydration are vital in preventing overtraining and supporting optimal training outcomes.