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We’ve been conditioned to think of exercise as a key ingredient — perhaps the most important ingredient — of any weight loss effort. You know the drill: Join the gym on January 1 if you want to reach your New Year’s weight loss goal. But in truth, the evidence has been accumulating for years that exercise, while great for health, isn’t actually all that important for weight loss. To learn more about why, I read through more than 60 studies (including high-quality, systematic reviews of all the best-available research) on exercise and weight loss for a recent installment of Show Me the Evidence. Here’s a quick summary of what I learned. Exercise accounts for a small portion of daily calorie burn One very underappreciated fact about exercise is that even when you work out, the extra calories you burn only account for a small part of your total energy expenditure.
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