A growing interest in promoting physical activity through multi-sectoral community-based programmes has highlighted the need for effective programme evaluation. Meeting in Rio de Janeiro, an international workgroup of behavioural, medical, public health and other scientists and practitioners endorsed the principle of careful evaluation of all programmes and in a consensus process developed the Rio de Janeiro Recommendations for Evaluation of Physical Activity Interventions". Among these recommendations and principles were that when possible, evaluation should 'built into' the programme from the beginning. The workgroup also called for adequate funding for evaluation, setting a goal of about 10% of programme resources for evaluation. The group also determined that evaluations should be developed in conjunction with and the results shared with all appropriate stakeholders in the programme; evaluations should be guided by ethical standards such as those proposed by the American Evaluation Association and should assess programme processes as well as outcomes; evaluation outcomes should be used to revise and refine ongoing programmes and guide decisions about programme continuation or expansion. It was also recognised that additional training in programme evaluation is needed and the Centers for Disease Control and Prevention's Physical Activity Evaluation Handbook could be easily adapted for use in culturally diverse communities, especially in Latin America. This paper describes a 6-step evaluation process and provides the full set of recommendations from the Rio de Janeiro Workgroup. The handbook has been translated and additional case studies from Colombia and Brazil have been added. Spanish and Portuguese language editions of the Evaluation Handbook are available from the Centers for Disease Control and Prevention, Physical Activity and Health Branch.