There are hundreds of exercises to do to strengthen your core. Crunches, planks, the bicycle, reverse crunch—they are all effective. The important issue is doing these exercises often and treating them as just as important part of your training schedule as your weekly long runs or speed drills.
“Most runners are probably sick of hearing about how they should strengthen their core, but guess what? There’s a reason! Those muscles are vital and they don’t always get worked enough with just running,” explained Leivers. “If you don’t have hours to spend in the gym it’s always best to focus on core muscles—and not just abs. Back muscles are just as important and are often ignored.”