In today's economy, not everyone can afford a gym membership. But fitness isn't just for the wealthy. Parks and other public access areas can help bridge the gap between those whose wallets bulge and those who just have wallets.

Research has long shown that living near green spaces -- parks, manicured boulevards, gardens, etc. -- can improve health. Recent research shows the benefits of green spaces are greater than originally thought. The open spaces help residents release stress, and they promote physical activity.

If you're feeling the budget crunch, a local park might be just the place to score some free fitness opportunities. You may be lucky enough to have a local park that has areas specifically designed for fitness. If not, there's still plenty you can do. Check out this post for ideas.