Running, CrossFit, Barre, Pilates, HIIT, yoga—there are countless ways to reach your fitness goals. Oftentimes, it’s the people you hang out with or the websites you read that deliver you to the doors of a new fitness studio. But once there, deciding whether or not you’ll keep coming back is up to you, and a major factor is your personality. “Discomfort is a layered process. We expect the physical discomfort of a workout and maybe even the emotional, but if you then add discomfort with big groups or discomfort with boredom, that amplifies the pain,” says certified mental performance consultant Angie Fifer, PhD, executive board member for the Association for Applied Sports Psychology and owner of Breakthrough Performance Consulting in Pittsburgh, PA.