How Can I Avoid the Post-Lunch Slump?

After a large meal, your digestive system is calling the shots, turning you into a sleepy shadow of your morning self. But there are ways you can bargain with biology.

Hunger makes the mind alert—this is a survival necessity handed down from our ancestors, who needed to keep going while searching for food. Today, this lends us a little concentration boost leading up to lunch.

After a meal, the arteries widen so that there is a healthy blood supply for the gut to squeeze and extract the nutrients. Becoming a food-processing machine is hard work—and this surge of blood goes hand in hand with the urge to put head to pillow. The instigator of this so-called food coma (or postprandial ...

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