Stroke is the leading cause of disabilities in the western world and may cause severe motor impairments. In the current clinical practice, progress during physical rehabilitation is assessed by a therapist for specific motor functions and through questionnaires that address patient’s general well-being or lifestyle. However, this approach is not only prone to subjectivity due to both the patient and the rater during the assessment, but it is also non-continuous and coarse grained, since it can only be administered every few months. In this paper, the concept of a complementary solution based on wearable technologies is proposed, and the remaining challenges to provide an objective, fine-grained and long-term evaluation of patient’s lifestyle through physical activity monitoring are highlighted.