Overtraining can negatively impact athletic performance by leading to fatigue, decreased motivation, and increased risk of injury. When athletes don’t allow adequate time for recovery, their bodies cannot repair and adapt to training stresses, resulting in diminished strength, endurance, and overall performance. Symptoms include prolonged muscle soreness, mood swings, and disturbed sleep patterns. Balancing training intensity and promoting proper recovery strategies, such as rest days and nutrition, are crucial in avoiding overtraining and maintaining optimal athletic performance.