This paper aims to ascertain: whether: (1) there were any immediate effects on managers' leadership competencies, leadership outcomes and teamwork as a result of the Outdoor Management Development (OMD) program; and (2) there were any differences among managers' competencies in relation to demographic variables. Specifically, a sample of 51 Greek business managers participated in a 2-day low-ropes course were assessed before and after training, using questionnaires and observation instruments. The most significant aspect of this study was that business managers, were found to reconsider their perceptions on adapting more transformational either transactional type of leadership when necessary, or trying harder to achieve business success and increasing their teamwork level. There were also significant differences of managers' leadership and teamwork competencies based on gender, age and tenure. The results of this study strengthen the support of the effectiveness of applying OMD in the corporate sector, where existing research is still limited.