It takes a special kind of warrior to brave the open seas on a shallow-keel boat and go raiding for riches. Physical presence is a given. A sense of raw power comes with the territory. And giving up is simply not an option. How you get to be like that is very much part of the physical workout you subject yourself to. Your body is always a work-in-progress. It responds to the physical demands made upon it. The Vikings were physically formidable because they lived in an environment that naturally favoured only the survival of the fittest. That ensured that even the weakest amongst them was more than capable of taking care of himself. This is one workout which you know you need to add to your training even if you don't go raiding along the English coastline every summer.
Extra Credit: 30 seconds rest between sets.