Both unarmed, but I can dress however I like? Hmm… Will need to dress such that it dissuades him from wanting to hit me with his fists and/or grab me with his arms. Some kind of razor-wire-mail maybe? Something spiky? Some protective headgear that includes goggles/visor that can’t easily be removed would also be in order. Will need to protect my knees and feet from kicks, too. But something along those lines, using modern materials that don’t impact my own movement too much will hopefully do the trick.
So we don’t have a very good definition of the physical fitness of this peasant. It could certainly vary a lot, and even in my old and decrepit state now I could take out a sickly peasant. I’d think the nobleman in this case would have picked one of the healthier peasants for this task though.
As a note about malnutrition, my grandmother endured actual starvation and a bout of typhoid during WWI. After coming to the US she suffered further malnutrition living in extreme poverty. At the age of 80 a mugger grabbed her purse, but she refused to let go. Eventually he pulled her down which broke her hip. Everyone in the family was certain she would have chased him down and beaten him at least half to death if not for the broken hip.
Can I move the fight to the center of an intersection in downtown Seattle at rush hour?
Here is a fighter who is 135 and 5’6 just for reference
http://www.ufc.com/fighter/TJ-Dillashaw/media#i=32
5’6 135 is not very small. Also keep in mind, people keep saying they are taller and therefore have more reach, that isn’t necessarily the case. ‘Reach’ can vary greatly and there is no guarantee that just because you are taller you will have more reach. Of course, using reach is a completely different matter.
When I lived in Florida I knew some Mexican farm hands who were that size/weight (and smaller). They were brutally strong and quick. Your average 6 foot tall 30 year old American male (even one in good shape) would be hard pressed to beat one of those guys. Especially if it lasted more than a few seconds…