As part of its Mission, PASOO aims to encourage research in the field of prevention and management of overweight and obesity. Furthermore it aims to provide an authoritative voice on the subject as well as a forum for the exchange of scientific information in this field. Towards this end, the association has conducted workshops to formulate study protocols in the different research areas. These protocols and the preliminary results of the workshops were presented during the first annual convention.

At the start of the new millennium, we celebrated the 2nd Obesity Awareness and Prevention Week. The week long celebration was formally opened by a Fitness Walk on September 3, 2000 which started at 6:00 am at The Fort. This activity was highlighted by the awarding of winners of the first slogan contest with the theme on obesity prevention. This was one of the means of involving the public in disease prevention and disseminating the dreadful effects of obesity and its correct management. The celebration was culminated by the 6th Annual Convention which tackled "The Challenges of Obesity in the New Millennium" held at the Edsa Plaza hotel on September 8, 2000 from 8:00 am to 5:00 pm. The 1st Physical Activity Pyramid Guide was also launched in the year 2000.

In 2003, the officers and board of directors of PASOO formally crafter its Mission and Vision to encompass the primary goal, the past present and future projects of the association. It was also during this memorable year that PASOO finally inaugurated its permanent home at Medical Plaza Ortigas Center.