A workout no longer has to start with a commute, a front desk check-in, or a fixed class time. It can start in a living room before sunrise, in a park during lunch, in a hotel room after a flight, or in a driveway while a child naps inside. That shift is changing more than workout habits. It is also changing who gets to build a business in health and wellness. Mobile training, app-based coaching, live video classes, and traveling personal trainers have made exercise more flex