Extreme Conditioning

Extreme Conditioning is a Call of Duty 4: Modern Warfare and Call of Duty: World at War third tier perk that doubles the user's sprint time. Extreme Conditioning does not increase sprint speed. This perk is unlocked at level 1.

In Game
This perk allows a player to gain a significant field advantage, reaching sniping points or objectives first. Sprinting longer or more frequently disrupts any opponent trying to gain a long range firing advantage. This perk can also be considered as a fallback when being chased or ambushed, sustaining the sprint to take cover and regenerate health. Low level players occasionally use this perk as a substitute to Dead Silence, until they earn it through ranking.

This perk is useful in Search and Destroy and for SMG and heavy weapon (ex: LMG) users. It is an unpopular 3rd perk due to the fact that players think the 3rd perk tier can be better spent on another perk such as Steady Aim or Martyrdom. However, this is not completely true. In a game of Headquarters, players with Extreme Conditioning will most likely reach the headquarters first. This perk is also useful for shotgun users, as it allows the player to flank the enemy. Extreme conditioning is especially useful if combined with Satchel Charge x2. Players with this combo can sprint over to a tank, place a satchel charge on it, and then run for cover.

Combining this perk with an M21 or P90 makes the player sprint for much longer, but this only is possible on the PC version.