Sprint

In the Battlefield series, sprint is the ability to temporarily increase traveling speed. Though it refers to the actual act of sprinting, it can also refer to speed boost in vehicles such as jets and FAVs. Sprint was introduced in Battlefield 2. To sprint, the player holds the Shift key on PC games or a matching button on console games.

The ability to sprint is limited, and represented by a Sprint Meter. The meter is drained by sprinting and jumping—when exhausted, the player cannot sprint (but can still jump) and makes gasping and wheezing sounds. The meter is regained by not sprinting and not jumping.

Boosting for vehicles is similar: boost is limited, drained with use, and regained with non-use.

Battlefield 2
Jets can use afterburners to temporarily boost. Unlike real life, Battlefield jets do not suffer from the extra fuel consumption.

Battlefield 2142
Five vehicles have the ability to boost their speed: The battlewalkers have unlimited sprint capability.
 * MK-15 Bandit
 * UAZ-8 Ocelot
 * L-5 Riesig
 * T-39 Bogatyr
 * Type-36 Hachimoto

Two unlocks affect a player's sprint capability:

Sprintcor 20 Enhanced Endurance
This common unlock permanently increases the player's sprint capacity. When equipping light armor, the player can sprint the maximum distance allowed. However, the player's sprint gauge recovers at the same rate, meaning extra time must be spent to recover from a long sprint.

Staminar 9 Recovery System
This common unlock permanently increases the player's sprint recharge rate. A player with both unlocks can sprint further, and recover their sprint meter in the same time as an unaided player.

Battlefield Heroes
Players do not sprint as in other games. However, two abilities allow certain classes to sprint:
 * Gunner: Leg It – can affect nearby teammates and team vehicles
 * Commando: Elixir – also provides a health bonus