In general, feeling sleepy after exercise isn’t a cause for concern. It’s normal to feel tired after physically exerting yourself. This is more likely after intense workouts. For example, you can expect your energy levels to dip after a long run or high-intensity interval training.

Getting tired after a workout is a common challenge that can diminish the rest of your day and leave you feeling discouraged about regular exercise Post-workout fatigue in healthy adults has many causes, including glycogen depletion, poor sleep habits, insufficient nutrition, high body temperature, low electrolytes, overtraining and other factors.

Listen to your body; fatigue is a sign that recovery has not taken place yet. If that is the case, then perform active recovery, which means participating in low-impact, low-intensity exercise such as walking, light swimming or yoga. Do not return to higher-intensity exercise until you feel fully recovered and recharged.