The phrase “comfort zone” has mostly negative connotations. A comfort zone is generally understood to be a metaphorical place where a person clings to familiar routines, and avoids embracing the new challenges that stimulate growth. One is usually advised not to sit idol in his or her comfort zone too long. Most mentors advise their clients to get out of their comfort zones ASAP.

I won’t deny that improvement in any part of life—sports, business, relationships, you name it—is impossible without discomfort. As Friedrich Nietzsche put it, “What does not kill us makes us stronger.” But I believe that comfort itself also plays a valuable role in the pursuit of improvement. After all, in order to get out of your comfort zone, you must first have a comfort zone to get out of!

In sports, for example, a comfort zone is a set of routines developed over time that work well for an athlete. The athlete draws comfort from those routines precisely because their effectiveness is well proven. Without such familiar habits, an athlete has no foundation from which to push himself or herself through discomfort to new levels of achievement.

All great athletes know the value of a good comfort zone. The great American marathon runner, Joan Benoit Samuelson once said, “Becoming a champion requires that you are comfortable when and where you are training.” Throughout her brilliant career, which included a victory in the 1984 Olympic Marathon, Samuelson trained alone in her home state of Maine. Her sponsor, Nike, tried to coax her into moving to Oregon to train with other top runners but she refused. Although in theory it would have made sense for her to take advantage of Nike’s resources and coaches and team environment, Samuelson liked where she was and believed in what she was doing, so she stayed in her comfort zone and the results of that choice speak for themselves.

Of course, Samuelson knew how to step outside of her comfort zone as well. She trained extremely hard and continuously challenged herself to achieve greater and greater goals. But those uncomfortable challenges always occurred in the context of a favored environment and a custom-fitting training system developed over many years—a comfort zone.

Every athlete knows that success comes through hard work. But there are many different ways to work hard, and no single way is right for all athletes. No less important to success is discovering one’s own best way of working hard. Athletes aren’t robots; they’re human beings. To become the best athlete you can be you have to consider everything that affects you as a person. If you are a happier in person in Portland, Maine than you are in Portland, Oregon, then you will probably work harder and more consistently in Maine and thus improve more.

What’s true in sports is true in the rest of life as well. As a professional writer, I have cultivated a unique way of working, one full of all kinds of idiosyncrasies, that works best for me. Without this, my comfort zone, I would not have the confidence to challenge myself to do things as a writer that I have never done before.

Take some time to think about the elements of your comfort zone as an athlete, entrepreneur, or whatever else. Is anything lacking? Don’t be afraid to do things even more your way.