This study measures the impact of additional training in communication (Body Language and Public Speaking) on the sense of self-efficacy trainee teachers of physical education during the preparation internship working life. An experimental group that received additional theoretical and practical training in the classroom communication was compared to a control group that followed the initial training course. Two measures of this sentiment were taken at different times using the questionnaire "Perceptions of self-efficacy of teachers (PAE)" cited by Crahay & Laduron (2009). This device allows to apprehend two dimensions: the perception of overall effectiveness and perceived self-efficacy. The analysis provides students who have received training in Body Language and Public Speaking to express a sense of greater efficiency than those who have received usual initial training.