Remember when you could completely skip the pre-run activations and post-run stretches at 20 years old, and still wake up the next morning feeling loose, fresh, and ready for some more miles? As you age, you may find yourself sidelined for days nursing aches and pains if you ignore stretching. The days of neglecting your mobility should (hopefully) be long behind you.That’s because unlocking longevity as a runner hinges largely on how well you can listen to your body, create recovery-minded habits, and stay healthy—and that’s especially important as you age. Our new program, How to Run Strong at 50+, helps you start creating a mindful, sustainable running routine that lasts, and includes key strategies for addressing age-related muscle loss and sidestepping injury.…