Students often do not take full advantage of peer tutoring instructional strategies because they are not sufficiently prepared to fulfill the role of tutor. This study examined whether implementing a peer tutor training program prior to the beginning of reciprocal peer tutoring (RPT) sessions might help overcome this issue. Gender differences were also explored. In a physical education setting, 48 novice ninth-graders were assigned in symmetric dyads to a physical practice associated with trained RPT condition (TRPT; n=24) or a physical practice associated with spontaneous RPT condition (SRPT; n=24). Moreover, 24 participants were assigned to a physical practice without any form of RPT control condition (PP). The peer tutor training, based on an original group interview technique, aimed at enhancing the explanatory potential of the tutor and his/her sensitivity to the specific needs of the tutee. Results indicated a superior motor performance for the TRPT condition and no difference between the SRPT and PP conditions. Interestingly, a positive relation between motor performance and self-efficacy beliefs was found for TRPT females. The assumption that the development of metacognitive awareness is one of the mechanisms underlying RPT's effectiveness was thus supported.Résumé Les élèves ne profitent pas toujours pleinement des méthodes d'enseignement de tutorat entre pairs car ils ne sont pas suffisamment préparés à remplir le rôle de tuteur. Cette étude a examiné si la mise en oeuvre d'un programme de formation au tutorat d'un pair, en amont du commencement de séquences de tutorat réciproque entre pairs (RPT), contribuait à surmonter ce problème. Les différences liées au genre ont également été considérées. Dans un contexte d'éducation physique et sportive, 48 élèves novices de 3 e ont été assignés en dyades symétriques à une condition de pratique physique associée à un RPT formé (TRPT; n=24) ou Eur J Psychol Educ (2010) 25:222-242