Automatically effective, Strain

A character using Sprint is magically infused with speed.  By taking one point of strain, the character may increase his base movement rate by his rank in Sprint (prior to calculations for encumberance and linear scale, so by 0.9 for a Troll and by 0.75 for many Windlings in flight) for one second.  It may be used multiple seconds in succession, for one strain per second.  It may be used for the character's primary means of locomotion (walking for a terrestrial character, walking and flying for a terrestial animal with flight, swimming and walking for a terestrial animal with Amphibious.  Fliers, in particular, should pay attention to G-forces.)