Armor and Encumbrance penalty on movement

[Kalzazz]

Also I find that heavy armor tends to be worn by high ST weapon masters, who tend to to A: need heavy armor to dampen the effects of being hit by someone vaguely like themselves, and B: can move around fairly nimbly in it anyway

A ST 17 has Basic Lift 57.8, so a full set of DR 9 armor and shield may run them around 120 lbs or so

And they need that armor desperately when they are trading punches at 3d+6 sw cut with a broadsword