When is it best to workout while fasting?

When considering the best time to work out while fasting, Andrew Huberman provides several insights:

1. Personal Preference:

   • Huberman notes that individuals vary in their preferences for training fasted versus fed. Some may perform better on an empty stomach for cardio, while others may prefer eating before strength training. There are no universal rules; it’s about what works best for you.

2. Fasted Training:

   • Huberman prefers to train fasted, especially for cardiovascular workouts. He typically exercises within an hour of waking after fasting overnight (3 to 10 hours). If he feels hungry, he may eat a small meal before training, but this varies based on daily schedules.

3. Meal Timing:

   • If you train in the afternoon, having lunch a few hours before can be effective. Huberman suggests that as long as you don’t eat within about two hours prior to a high-intensity resistance workout, you're likely to optimize performance.

4. Caffeine Benefits:

   • Working out in a fasted state can enhance the effects of caffeine, making it feel more potent. Huberman drinks water and caffeine before morning weight training, but generally not for cardio: 1 2.

5. Post-Workout Nutrition:

   • Regardless of whether you train fasted or fed, eating after workouts is essential, particularly for recovery. Consuming carbs and proteins post-exercise supports muscle recovery and replenishes glycogen stores.

In summary, the best time to work out while fasting is highly individual. Experiment with your own preferences around workout intensity and nutrient timing to find what maximizes your performance.