Maybe you haven't run since you were 16, or maybe you've literally never gone for a jog. But that doesn't mean you can't become a runner after 40, says running coach and Olympics-qualifying marathoner Gordon Bakoulis, 56. "Everyone's a runner. Some people just haven't discovered it yet—and it's never too late." 

But here's the thing: Becoming a runner in your 40s isn't quite like picking up the sport in your 20s. When you're older, muscles take longer to repair themselves post-workout, making pulled hamstrings, knee problems and other aches and pains more of a risk for runners over 40. So before you lace up your sneakers and cue up your cardio playlist, it's important to arm yourself with the intel that will help you stay injury-free and motivated.

Here's what every beginner over 40 should know before getting started:

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