The ruck march (or “rucking”) is a staple of military training. All United States Army infantry recruits must complete hours-long ruck marches. In other branches of the military, special operations forces complete grueling selection events where the ruck march is the principal tool. And there’s good reason for this popularity of rucking in the military. Rucking has numerous benefits: it builds strength, stamina, and character. If you want to be strong, have great endurance, and build me...