The present article is part of the diploma thesis entitled Frequent causes of violinists’ injuries and selected preventive exercises, which was defended in July 2020. The thesis was written under the supervision of Maciej Łabecki, dr hab., prof. at the AM, (Faculty of Instrumental Performance, Academy of Music in Łódź). The text is divided into two parts – the first part analyses posture mistakes which are made by the majority of violinists while playing their instruments and examines their causes. The second one – based on foreign language publications – describes relaxation techniques and provides an exemplary set of warm-up and stretching exercises, which should be done by every musician before, during and after their practice sessions. Different types of physical activity and their health benefits are also explained in this part. The author made her decision to share the practical part of her diploma thesis hoping that it would prove helpful for other musicians, especially string instrument players. She would appreciate if this publication encouraged readers to familiarise themselves with her entire research.