Before her life changed last year, Lauren Ziegler hated running. The Grand Valley State University student, now 22, grew up playing team sports in high school, then joined a CrossFit club in college as a way to stay fit as an undergrad. “I started competing in CrossFit competitions in college,” Ziegler told Runner’s World. “I loved every part of my CrossFit workouts except for the running. It was my least favorite thing in the world. The most I would ever run was two or three miles a week.” One morning before class in December 2018, Ziegler woke up to find...