The modern fire-fighter or the soldier carries a load of approx. 20-25kg (44-55lbs) at the most. That’s about the same load imposed on a late medieval armored fighter, and we know this from recent scholarly work, including experimentation phases with modern-day equipment and faithful replica (3D motion capture, energy expenditure measured on treadmills).
We chose the obstacle run on a military base in Switzerland to demonstrate the mobility of the armored fighter with a comparative approach. Everybody knows, or can easily picture how agile fire-fighters or modern soldiers are. Is it the same for an armored knight?