Nutrition Facts with Dr. Greger Exercise and Weight Loss
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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.
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Swimming Didn’t Produce Weight Loss
- Women randomized to an hour a day of walking, cycling, or swimming had very different weight outcomes after six months.
- Walkers lost ~17 lbs, cyclists ~19 lbs, and swimmers gained about 5 lbs with no fat loss measured.
Cool Water Exercise Raises Post-Meal Intake
- Water-based exercise, especially in cool water, can heighten hunger and lead to large compensatory calorie intake.
- After burning ~500 calories in cool water, people ate nearly 900 calories at the next meal, wiping out the deficit.
Cold Land Exercise Also Boosts Appetite
- Exercising in cool air on land can also increase subsequent calorie intake compared with warmer conditions.
- Studies found greater covert buffet consumption after treadmill walking at ~46°F than at ~68°F.