… a stroke, we urge everyone to BE FAST. BE FAST Each letter in the acronym, BE FAST, stands for a warning sign of stroke. B – Strokes that begin in the posterior of the brain (which can account for up to 20-25% of all strokes) can often cause sudden changes in balance . You may experience … controlling diabetes Being active Eating better Losing weight Not smoking If you're at risk for stroke, your provider may also prescribe medications to prevent stroke. A healthy lifestyle …