Sprint is the fastest Movement Activity, but drains 10 Phlegm per second while it is toggled on.
Activity Movements are Movement Actions which change your Movement speed. Toggling on an Activity Movement will drain Phlegm until it is toggled off again, which will revert your speed back to a Walk. An Activity Movement will automatically turn off if your Phlegm gets too low.
||Speed vs Walk
Other Speed Modifying Actions
Certain Affects or items will modify your Activity Movement speed.