One strategy for research is to use bibliographies to find additional relevant research on a topic. Finding the full-text of a source from a citation often requires a different type of search to locate. Here are the steps:
Remember you're thinking about building a healthy aging program. Look for studies that have similar strategies or outcomes. If the goal is to get people walking, there are multiple strategies to achieve that goal. Thought of another way, walking programs have multiple outcomes like increased strength, cardiovascular health, and improved balance.
There is more than one way to approach these programs.
It's pretty unlikely that you'll find scholarly articles about BOTH the health issue and the geographic area you're focusing on. So approach it this way: