If you are a runner over 35, you probably fell in love with running for its simplicity: tie up your laces, step out the door, and go. But as the miles accumulate over the years, you might start noticing that your recovery takes a bit longer, your joints feel a little stiffer, or minor niggles keep popping up. Many runners assume the answer to running better or faster is simply more running. But if you want to stay healthy, resilient, and fast into your 40s, 50s, and beyond, s