If you want a modern day comparison, the average weight of the gear a soldier had to carry into battle on modern battlefields, depending on specialization of course, weighed anything between fifteen to ninety pounds. As you can imagine, running, sprinting, and fighting with such weight with an appreciable speed, even with dexterity and grace, was well within the realm of possibility. So was carrying the rest of his gear with it, because there was no real room in his pack bags as he placed his new clothes in them. He was very likely going to have to wear his armour everywhere.