intense.

it's how i like to live.  test your limits.

in·tense

1. Possessing or displaying a distinctive feature to an extreme degree: the intense sun of the tropics.

2. Extreme in degree, strength, or size: intense heat.

3. Involving or showing strain or extreme effort: intense concentration.

4a. Deeply felt; profound: intense emotion.

4b. Tending to feel deeply: an intense writer.