What is the recommended rest period between sessions for any single muscle group?

The recommended rest period between sessions for any single muscle group is typically 48 hours. This duration is important because it allows sufficient time for the muscles to recover from the stress and potential micro-trauma incurred during the workout. Recovery is essential for muscle hypertrophy and strength gains, as it is during the rest period that muscle fibers repair and adapt, ultimately leading to increased performance and reduced risk of injury.

Training a muscle group too frequently without allowing adequate recovery can hinder progress and may lead to overtraining. Therefore, a 48-hour rest period strikes a balance that promotes muscle recovery while still allowing for consistent training frequency throughout the week. This approach is widely supported in exercise science, aligning with the principle of allowing enough time for recovery while maintaining a robust training schedule.