Knowing when it's time to "pivot" with a business plan is often essential to a business's success. It's no different for business people: Choosing the right moment for a career change-of-course can be crucial. It certainly has been for Kimberly Fowler.

Fowler is founder and CEO of YAS Fitness Centers, a chain of innovative yoga and indoor cycling studios that's currently expanding across Southern California (and soon, NYC). She also heads YAS Yoga & Sportswear, YAS Productions and YAS Franchise Inc. Fowler's pioneering YOGA for ATHLETES