Signs of overtraining syndrome in athletes include excessive fatigue, decreased performance, and prolonged muscle soreness. Other symptoms may involve mood swings, irritability, sleep disturbances, and increased susceptibility to injuries or illnesses. Athletes may also experience a decreased appetite and significant changes in body weight. Monitoring these symptoms is crucial, as early recognition can help prevent long-term damage. Incorporating rest days and ensuring balanced nutrition and hydration are important strategies for recovery. Professional evaluation and adjustments in training intensity can also aid in managing overtraining.