An online fitness coach works with clients over the internet to help them achieve their health and fitness goals. As an online fitness coach, you communicate with clients through email, video calls, online forms, and chat messages. You provide each client with an individualized diet and exercise plan based on their personal goals and limitations. You also provide clear and detailed instructions, including video samples of you or another qualified individual demonstrating particular exercises. Your other duties include checking in with clients regularly to follow-up on their progress and adjusting their training plan as needed.