The primary causes of exercise-induced fatigue include a depletion of glycogen stores, accumulation of lactic acid, and alterations in electrolyte balance. Additionally, inadequate hydration and lack of sleep can exacerbate fatigue. Psychological factors, such as motivation and mental fatigue, also play a role in how one experiences fatigue during or after exercise. Overtraining without sufficient recovery can lead to central fatigue, impacting both performance and recovery times. It’s essential to address these factors to maintain optimal performance and recovery.