January 29, 2018
Obviously, scientists have known for a while now that exercise is good for your health. And over the past few decades, lots of research has proven why and how. But up until relatively recently, no one understood exactly what happens inside the human body during exercise.
A recent study in the journal Cell Metabolism provides some answers, and they're pretty fascinating.
"For some time, scientists have suspected that the body’s internal organs are as gossipy and socially entangled as any 8th-grade classroom," writes Gretchen Reynolds. Those suspicions were true: when you exercise, your body releases "vesicles" into your bloodstream, most of which then travel to your liver.
A vesicle is a small structure with a cell — almost like a bubble — that can hold all kinds of biological material, from proteins to enzymes and cellular "waste." During exercise, hundreds of protein-bearing vesicles are carried to the liver, where the "wall" of their "bubbles" dissolves, and the protein is absorbed by your liver, which then converts it into energy for the rest of your body to use.
Now scientists know how our livers can tell when it needs to jump-start our metabolism during exercise — because the vesicles told it to!
Make your vesicles happy. Exercise.
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