Boys with Duchenne Muscular Dystrophy have a different life from most children. As they grow up, their muscles lose strength progressively. Around the age of 10, they become wheelchair-bound and in their teens, they lose most of their arm function. Therefore, an exoskeleton was developed to support the arm function of Duchenne boys between the ages of 10 and 17. As boys with Duchenne grow from children into adults, their wants and needs regarding (medical) products is expected to change. Therefore, the exoskeleton should be redesigned to mature with the user and change over the years.