Common indicators of overtraining include persistent fatigue, decreased performance, and increased irritability. Individuals may also experience disrupted sleep patterns and heightened susceptibility to illnesses. Physical signs can range from frequent injuries to muscle soreness that doesn't subside. Additionally, a decrease in motivation to train and mood swings often accompany overtraining. It’s crucial to incorporate rest days and listen to your body if such symptoms arise, as pushing through can lead to longer recovery times and setbacks.