Most men hit 30 or 40 and think they’re “getting old.” The truth is, you’re not aging — you’re just stuck in bad habits. Here’s how I went from tired and out of shape at 26 to stronger, clearer, and more disciplined at 38 — and how you can too.

Michelle Howell, an Orlando-based runner and coach, recently shared her insights on coaching different age groups in an interview with Runners Of, ...