Very Heavy Swords Were Common
It makes sense to suppose that you'll want something as hefty as a sledgehammer if a sword is going to be expected to slash at opponents who are wearing armor and holding shields. By the time the Medieval age arrived and warriors needed a weapon to disable individuals wearing the greatest deflectors available, warhammers had become a common tool.
Swords have really historically been quite lightweight. According to Escapist magazine, heavier broadswords were probably only going to weigh around four and a half pounds, so if a person can easily hold a typical laptop, they are likely in good enough shape to hold a sword.
Even the Middle European Zweihander, which is known to have been among the most biggest swords ever used in actual battle, weighed 8.8 pounds. A musket used in the American Civil War weighed around 9.75 pounds, therefore soldiers who attempted to bayonet or club their adversaries were exerting more effort than the most powerful ancient swordsmen.