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Among the �����ԹϺ��� fitness team, there is  that we turn to for nuanced, critical takes on the state of running, links to the newest cutting-edge research, and sage fitness advice. That’s Steve Magness, exercise scientist, author, head cross-country coach at the University of Houston, and occasional �����ԹϺ��� contributor.

We thought it would be fun to reach out to Magness and see who he’s following, and then ask that person who �ٳ���’r�� following, and so on. It was a snowballing, email chain–style process—a more coherent and insightful version of the telephone game. We figured that if we kept digging, we might reach the deepest sources of compelling running news and analysis. And it worked.

Here are a few brilliant sports scientists who the personalities you know turn to for running news and advice.

How the best US 10k runners strike the ground. Data from Iain Hunter at the US champs.

— Steve Magness (@stevemagness)

Steve Magness: Who Do You Follow?

Magness says the follows he values most on Twitter include , a South African researcher who runs the blog , and , a lead researcher at the . But his go-to is Alex Hutchinson (), who writes the for Runner’s World, in which he dives into the latest research on the science of fitness. “Alex has a gift for taking the complex and breaking it down into simple, actionable takeaways,” Magness says. “For all things sports science, Alex is the best.”

Lessons from Breaking2? Pics of the last 4 marathon WR record-setters NOT drafting behind their pacers:

— Alex Hutchinson (@sweatscience)

Alex Hutchinson: Who Do You Follow?

When we reached out to Hutchinson about his favorite Twitter follow, he replied, “I guess it won’t work to say Steve Magness.” Instead, he told us, “I tend to follow a lot of scientists, athletes, and coaches, but I get particularly psyched about people who straddle both those worlds.” Hutchinson says no one is better at that than Asker Jeukendrup (), a Dutch Ironman triathlete, sports nutritionist, and adjunct professor at several European universities. “He’s one of the most influential sports nutrition researchers of the last few decades,” Hutchinson says. “He played a key role in the development of concepts like .”

Asker Jeukendrup: Who Do You Follow?

Asker says that one of his favorite sources of fitness science is the (), an online course taught by leading researchers in the field. Its Twitter account frequently discusses how high-powered athletes fuel for their sports. But Jeukendrup’s most-valued follows are two women at the (AIS): Louise Burke (), head of sports nutrition at AIS, and Shona Halson (), the head of recovery, who studies (and tweets about) how hydrotherapy, overtraining, and sleep monitoring affect athletes.

Fun couple of days in the lab with – looking at effect of recovery on adaptation to training

— Shona Halson (@ShonaHalson)

Shona Halson: Who Do You Follow?

Halson says her top follow is Keith Baar (), a professor at University of California, Davis who studies, among other things, the way exercise increases muscle mass. “He is always at the cutting edge of science,” Halson says. “As Baar works with athletes, he has the ability to translate science into practical and meaningful information.”