Nutrition Facts with Dr. Greger
The Best Time to Exercise for Weight Loss
Nov 9, 2023
Exploring the best time to exercise for weight loss, examining fat burning in a fasted state vs. a fed state, the role of carbohydrate metabolism, and the impact of exercise timing on glycogen and insulin release. Analyzing the effects of pre-meal and post-meal exercise on weight loss, and discussing optimal timing for exercise and blood sugar control in individuals with diabetes.
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Quick takeaways
- Exercising before a meal leads to more fat being burned during the exercise compared to exercising after a meal.
- Exercising before a meal may lead to sustained fat burning throughout the day, even with low to moderate intensity activity.
Deep dives
Exercising before a meal leads to more fat burn during exercise
Multiple experiments have consistently found that exercising on an empty stomach, before a meal, results in more fat being burned during the exercise compared to exercising after a meal. On average, low to moderate intensity activity before a meal burns about three grams more fat than the same exercise performed after a meal.
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