Tomorrow is July 1, which means a lot of my favorite local trails will be opening, and my friends and I will have a lot more options for our weekly rides. As the “official” season kicks off, I’m reminded of my favorite scientific study EVER, which is the likely explanation behind why I have such a tight-knit group of girlfriends that I regularly get outside with.
Here’s the gist.
When two people move in rhythm (like hiking, dancing, or pedaling bikes) their brain waves start to mirror each other, especially in the region that handles social coordination. Watching your partner take a step lights up the same neurons in your brain as if you’d taken it yourself, and pretty soon you start to match their pace without even trying. It’s called your mirror neuron system, and it’s been cited by multiple neuroscientific studies. What's more, as you fall into step, your heart rates, breathing patterns, and even autonomic nervous system (the control panel that runs your involuntary survival functions) slowly drift into a shared rhythm. This is called interpersonal synchrony.
Here’s what makes this fascinating: the blend of these two phenomena gives people a deep and automatic sense of security and mutual understanding.
The research shows over and over again that matching your movements to another person increases “mutual liking, empathy, and cooperative behavior.” It bypasses your analytical mind and tells your brain that this person is someone you can trust, with zero conversation required to get there.
Being outside multiplies this effect. Your cortisol drops, giving your brain more bandwidth to focus on connecting with the people around you. By the time you pack up your gear at the end of the day, you aren't just tired from a workout; you are carrying a "shared high" that makes you feel deeply connected to your group.
So the bond you build with your outdoor partners isn’t just because you both love dirt bikes (or whatever sport you do together). It’s literal biology doing in one hike, ride, or run what most relationships take months to build.
Pro tip: If you really want to get to know someone, opt for a ski date instead of drinks, or take that coffee for a walk.
See you out there!
Tana
p.s. I know I’m biased, but this one’s probably worth sharing with your trail buddies ;)
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