An appropriate recovery time between strength training sessions generally ranges from 48 to 72 hours, depending on the intensity of the workouts and the muscle groups targeted. This recovery period allows the muscles to repair and grow stronger. Inadequate rest can lead to overtraining, which can hinder performance and increase injury risk. Factors such as age, fitness level, and type of strength training also influence recovery needs. Listening to the body and adjusting schedules accordingly is crucial for optimal muscle development.