Nutrition Facts with Dr. Greger
Exercise and Weight Loss
Aug 31, 2023
This podcast explores how much exercise is needed for weight loss, the impact of temperature on appetite, the role of exercise in obesity treatment, and the relationship between exercise and weight loss. It discusses a study comparing walking, cycling, and swimming for weight loss and reveals that swimmers did not lose weight. The podcast also highlights the small effect of exercise on weight loss compared to calorie overconsumption and emphasizes the importance of diet. Additionally, it mentions a study on calorie expenditure during sexual activity and promotes the speaker's books.
10:47
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Quick takeaways
- Swimming may not be as effective for weight loss compared to walking or cycling due to its ability to increase appetite significantly.
- Contrary to the food industry's focus on inactivity, research suggests that the increase in calorie consumption is the primary driver of the obesity epidemic and physical activity alone cannot compensate for excessive calorie intake.
Deep dives
The Impact of Swimming on Weight Loss
Swimming may not be as effective for weight loss compared to walking or cycling. In a study, participants who swam for an hour a day didn't lose any weight while the walkers and cyclists lost 17 and 19 pounds respectively. The peculiar finding is attributed to swimming's ability to increase appetite significantly, unlike land-based exercises. Furthermore, exercising in cold water raises hunger even more, leading to increased calorie intake after the workout.
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