Rucking doesn't cost a ton of money—and the fitness trend promises big health benefits if done safely. Four hikers with large backpacks trek up a hill in the rain in Skjoldungen, Sermersooq, Greenland ...
It's not unusual for fitness equipment, trends, and workouts to mimic everyday movements or activities. The stair climber machine at many gyms, for instance, is not much different than the flight of ...