The teaching and learning process of a musical instrument is intrinsically related to the development of procedural skills, where the acquisition of control in the execution of the actions occupies a highly significant place. From this point we turn our gaze towards the Alexander Technique (AT), where the mind-body is assumed to function in an integrated way. In the present study we examine the impact of its implementation in violin and viola classrooms, in relation to the modeling of specific behaviors to the performance and musical interpretation through a recording technology. To do this, we use the qualitative methodological paradigm, which conforms both to the objectives of our research as well as to the theoretical-practical foundation of AT, characterized by a holistic vision. The study starts from a specific course in this subject for elementary and professional teachers of violin and viola. After its completion, different teachers videotaped their pedagogical practices implementing the TA, which we analyzed through our proposed analytical model of classroom praxis. Using the Atlas.ti software for the treatment of the data from the audiovisual records, the results revealed that the professors subject to research incorporate various aspects of the AT in their pedagogical-didactic classroom action. The conclusions point to a set of potentialities that the application of AT presents in relation to the instrumental teaching-learning process. [ABSTRACT FROM AUTHOR]