Sometimes it takes a good amount of effort to get myself off the couch and out for a run. But when I manage to get moving, it feels great. On the other hand, my dogs seem to naturally love running and could probably gallop around all day.
As it turns out, exercising is another way that humans and canines are alike. Researchers at the University of Arizona recently found that, like people, dogs experience a “runners high,” the rush of positive feelings that result from exercising.
The study originally set out to see if certain species evolved to like running. Sprinting uses a lot of energy and increases risk of injury, so the researchers hypothesized that humans and dogs didn’t run because they had to (for capturing prey and escaping predators), but because they became hard-wired to enjoy it.
They compared species who naturally run—humans and dogs, to ferrets, which are considered non-runners. For the experiment, the dogs and ferrets were trained to use a treadmill using positive reinforcement.
The results showed that the people and dogs had higher levels of endocannabinoids, the chemicals that alter and lighten mood, after running, but not walking. The ferrets had the same levels before and after both, suggesting that they derived no pleasure from the more intense activity.
Apparently these days most humans regularly suppress our biological desire to run, but dogs do not. So the next time your pup looks like he wants to get out and play, lace up your sneakers and go out together. You were both born to run!