Optimal recovery times for strength training typically range from 24 to 48 hours, depending on various factors including the individual's fitness level, the intensity of workouts, and the specific muscle groups targeted. Rest is crucial for muscle repair and growth, allowing adequate time for the body to recover and strengthen. For example, a beginner may require more recovery time than an experienced athlete. It is also important to listen to one’s body; if muscle soreness persists, extending recovery time may be necessary to prevent injury or overtraining.