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The correct answer to your question is both.

Friction both supports and opposes every one of those sports.

For running, you need friction under the sole of your foot.  On the other hand, the friction of the molecules in the air moving past your body is providing resistance.

For car racing, friction is needed under the tires for … Read more
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From Wikipedia:
In Scottish mythology, Nicevenn (also called Dame Habonde, Abundia (German), Satia, Bensozie, Zobiana, Nicheven, or Herodiana) was a Scottish Goddess (or witch according Christian recharacterization) during the … Read more
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It's not so much coming from anywhere as just staying there. Nitrogen is rather uncreative in its normal gaseous form - lightning can combine it with things, but otherwise it does nothing naturally. When you see 'packed in a protective atmosphere' on something, it often means nitrogen. The nitrogen cycle is biologically driven. More reactive … Read more