How to Create a Sustainable Fitness Routine Creating a sustainable fitness routine is key to long-term success. Many people start strong but eventually lose motivation or become overwhelmed. The goal is to build a routine that fits into your lifestyle and can be maintained for the long haul. In this article, we’ll guide you through creating a fitness routine that works for you. 1. Start Slow and Build Gradually It’s easy to get excited and dive into an intense workout schedule, but this can lead to burnout.