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.
field
a luger?
competitors
Canidate -US Gov NovaNet
used ruthless buiness tactics against their competitors
Sumo.
They are called aerobic exercises (or cardiovascular exercises). These include running, jogging, swimming, cycling, etc.