APEX: Social Facilitation.
Olympic competitors are called Olympiads.
challenger
descrimination
The Pharcyde ''running''
You can, but you will probably get a penalty called against you.
competitors
field
a luger?
Canidate -US Gov NovaNet
used ruthless buiness tactics against their competitors
Pain in the stomach while running is called a side stitch. This may be due to membranes and muscles rubbing against each other.
Sumo.