**Effects of Individualized Training to Reduce Fatigue in Patients With Newly and Advanced Diagnosed Multiple Sclerosis** **Multiple Sclerosis (MS)** is a disease where the body's defense system attacks the central nervous system, causing various symptoms. One common symptom is **chronic fatigue**, which means feeling very tired most of the time. This study wants to see if a special exercise plan that patients do at home can help reduce this tiredness. The exercise is guided by a mobile app, making it easy and personal for each person. **Eligibility**: To join, you should have MS diagnosed recently or for a while, feel very tired (with an FSS score > 4), and be able to walk for 10 minutes. You need a smartphone with internet and must understand the study details. **Key Points**: - The study involves personalized home exercises for MS patients to reduce fatigue. - Participants will use a mobile app to guide their exercises. - It's important to have a recent MS diagnosis and feel comfortable using a smartphone. **Exclusions**: You cannot join if you have severe leg problems, changed MS medication recently, or if you are pregnant.