Incorporating rest into a fitness program is essential for recovery and preventing overtraining. Aim to include at least one or two rest days per week, allowing muscles to repair and grow stronger. Active recovery days can also be beneficial, involving low-intensity activities like walking or yoga. Listening to your body is key; if experiencing fatigue or soreness, more rest may be needed. Consider implementing deload weeks where intensity or volume decreases periodically, balancing workouts for optimal long-term performance.