Without that foundational core strength, it’s easy to let your form slip in the second half of long races. Working on this core strength and endurance is beneficial for everyone, not just runners, because it applies to all kinds of other sports, workouts mand general life. Watch Phily Bowden’s 12-minute core workoutThe Core Workout That Changed My Running - YouTube Watch OnBowden leads you through the workout and gives some tips both while doing so and through a voiceover at times. Tom's Guide: Direct to Your Inbox Get instant access to breaking news, the hottest reviews, great deals and helpful tips. Alternatively, you can read our content on the Tom's Guide app available now for iOS and Android.