We’re sure you know this by now (but in case you didn’t) running should be part of every runner's training routine; thanks to its ability to boost power, improve speed, and reduce the risk of injury.

Try it as a standalone core workout, or at the end of a lift as a finisher.

Natural Bodybuilders Swear by This Science-Backed Arm Workout for Explosive Growth originally appeared on Men's Fitness. If you want big arms that turn heads (and who doesn't?), Jeff Nippard’s science ...