The Institute of Transportation Engineers (ITE) features several resources discussing the linkage between transportation and health. Here is the link to the page where they list references like reports from various sources as well as tools.
This is definitely a topic that needs more attention and studies in the Philippines in order to have local evidence (there are already strong evidence abroad) supporting active transportation and how it helps make citizens healthier. Of course, that goes without saying that active transport should be integrated with an efficient public transport system. That is so that the increasing share of private transport can be checked (no thanks to Grab and Uber) and we can either retain or increase public and active transport shares.