Clearly, all drinks should come in a chocolate cup. |
The next morning, feeling guilty about our night of overindulgence, we went for a run through Parque del Retiro, Madrid’s central park. It was ridiculously crowded, even for a 70-degree Saturday morning. People were running, walking, rollerblading, and biking wherever there was room. And everybody was fit.
Examples of Spaniards. You're welcome. |
Pig at the airport: He is only smiling because he is getting the hell out of Spain. |
Perhaps Spaniards wouldn't be so slow if they invested in big-girl size cups of coffee. |
As with the end of every vacation, we were scared to weigh ourselves when we came home. It turned out that there was no need to worry. I lost a pound and my husband only gained half a pound. It appears that the super-awesome Spanish thinness wore off on us too.
This octopus was so fresh that it swam to the bar on its own accord. This ain't no Red Lobster. |
Processed foods tend to by higher in fat and sugar, both known culprits in the battle of the bulge. They also are engineered to taste good and to play to our natural caveperson instincts to take in as much fat and as many calories as possible since the next food shortage is immanent. Our trip to Madrid sparked my curiosity about whether there was something a little more complicated at work. Is there a difference in how our bodies process whole foods versus processed foods?
I did a Google search and found a lot on this topic—a lot of really questionable theories, that is. There were blog posts about how toxins from processed foods collect in body fat and, uh, make the body fat weigh more (or something like that); articles about how processed foods make the body work harder (which would actually burn more calories, not less); and Kirstie Alley’s new diet plan (yes, she’s at it again). Just a couple of minor issues—none of these articles cited research or made a lick of sense.
While people are blogging about this subject ad nauseam, few are researching it. Hours of searching the peer-reviewed literature turned up exactly one article. Pomona College researchers experimented on 18 subjects to see if a processed cheese sandwich a la Kraft Singles Prepared Cheese Product on white bread reacted differently than a slice of natural cheddar on multigrain. It turns out there was a pretty substantial difference.
Our bodies burn energy three ways: basal metabolic rate (BMR) (the calories that the body burns doing normal bodily functions like breathing), activity, and through the thermal effect of foods (TEF) (i.e., the energy our bodies use to breakdown food, digest it, use nutrients, and do all sorts of other things). On average, 10% of our calories are burned through TEF, but that number can fluctuate quite a bit. Protein takes the most energy to metabolize, followed by carbohydrates, then by fats. Foods that are structurally more complex, that is they have more nutrients, more fiber, and more protein, take more energy to process. Whole foods are generally more complex than processed foods.
Step away from the processed cheese food and no one gets hurt. |
The researchers found that after eating the processed cheese sandwich, the subjects burned 50% less calories than after eating the natural cheese sandwich.
And by tapas, I mean wine. |
The one article I could find:
Barr, SB, Wright, JC. (2010). Postprandial energy expenditure in whole-food and processed-food meals: implications for daily energy expenditure. Food & Nutrition Research. 54: 5144.