NacNak said
.... jogging with a really heavy back pack on?
What Nac said. From what I understand, a soldier may occasionally be required to do so with all of their gear. I can't remember whether or not they'll make you do it in pretty much whatever weather condition, but I kind of want to lean towards yes. That said, while walking and rucking may suck, hiking is pretty fun. You'll be sore like a mother fucker the next day if you're carrying a lot of junk on you for a long time over rough terrain, but IMO it's a good kind of pain, the kind that lets you know that you didn't let a bit of discomfort stop you from what you were doing.