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May 10, 2026

Do you take after your dad’s RNA? Holly Barker, Knowable Magazine | usagoldmines.com

On a bright afternoon in Jiangsu, China, Xin Yin is playing personal trainer to some mice. One by one, he sets the rodents on a miniature treadmill that starts slow and gradually speeds up. These littermates are born athletes, able to run farther with less lactic acid buildup than average laboratory mice.

The secret to their speediness isn’t carried in their genes—the animals come from the same genetic stock as a group of control mice. And they haven’t received any special training. Instead, their fitness seems to stem from their father’s exercise habits before they were even conceived. It’s a finding suggesting that running might benefit not just the exerciser, but also his unborn children.

“I was very surprised when I first saw the data,” says Yin, a biochemist at Nanjing University.

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This articles is written by : Nermeen Nabil Khear Abdelmalak

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