<human>: Can you condense the text into three sentences or less?

For the record, children at 8 years of age was an arbitrary enemy - mostly used for illustration to indicate your physical and mental superiority over your opponents, who are like you, but less complete. Sorry if the thought offended you - just reconsider given that.

We're assuming that the enemy has both the intent to kill you and the knowledge of how to do so. While younger than you, they are familiar enough with the human body to use basic strategies (read: poke you in the eyes/kick you in the balls/etc) to harm/disable/inflict pain. They also know where your vital areas are - head, neck, heart, etc - and intend on exploiting those. What they don't know are more advanced things like pressure points, how to physically break arms/necks/legs/etc.

That said, the only major advantage they have over you is their number. You have your hands and whatever skills (physical, mental, mutant, or otherwise) you currently possess. There are no weapons, resources (i.e., fire), or other means to give you an advantage - no Hunger Games bullshit here. This is raw combat.

The stadium is entirely walled-in; no escape routes exist. The stadium is roughly the size of a football field, though entirely made of concrete, rather than turf. Walls surround the stadium floor, extending ad infinitum into the sky. 

How long would you survive (in number of conquered foes)? What would your strategy for survival be?
<bot>: You, stadium, no escape, no weapons, no resources, unlimited small humans know how to destroy you and want to do so; how many would you defeat and how would you do it?