Researchers May Have Discovered the 'Lazy' Gene, But Just What Does 'Lazy' Mean Anyway?
LatestI’ve been thinking a lot about laziness lately. It’s all in a self-serving way, sure—why do I fall into such pits of paralysis at the most inconvenient times? Why do I put off literally everything to the last minute, including things I genuinely enjoy doing? Why did I let my mother come over and do my dishes for me yesterday even though I am 31 goddamn years old? (I LOVE YOU, MOM.) Am I really just a fundamentally lazy person? On the one hand, maybe. But on the other hand—and here’s what my brain’s been fizzing about lately—I frequently work 60+ hours in a week. I’ll pull exuberant, obsessive all-nighters to get every one of my Jurassic Park jokes exactly night. I spent the weekend gleefully ripping out brambles and weedwhacking the brush encroaching on my mom’s long forest driveway (my blackberry scars are badass). Are those things that a lazy person does? I’m not sure.
So I suppose I’m interested—both academically and selfishly—in how we define laziness. Researchers at the University of Missouri say they’ve succeeded in breeding “laziness” out of lab rats. Their measure of laziness is how long different populations of rats will voluntarily run on a wheel.
Via the Atlantic:
METHODOLOGY: Researchers at the University of Missouri took lab rats that spent the most time voluntarily running, and bred them with other highly active rats. They then did the same for the least active rodents. Eight generations later, they analyzed the behavior and physiology of the original rats’ great-great-great-great-great-great grandchildren.
RESULTS: The rats had subtle differences in body composition and in the levels of mitochondria in their muscle cells. But those bred to be lazy chose to spend significantly less time on the wheel, ran shorter distances, and were generally slower. By the tenth generation, the active mice were running ten times as much as the lazy ones. And after six days of that, they had lost considerable body fat, while the others neither gained nor lost weight. The researchers narrowed down the discrepancy in motivation to 36 genes that appeared to be responsible.
So, how do we know that this is a “laziness” gene and not a “compulsive running” gene? And would selectively breeding (eeeek!) a compulsive running gene in humans actually be a healthful thing for us? Or how do we know it’s not just an anxiety/boredom gene? It’s not like rats get to have hobbies other than running on a stupid wheel. What if running on a wheel is the only outlet for them to exorcise that boredom?