I’M GUESSING IT’S DECLINING LEVELS OF FITNESS: Stroke Rates Rising in Younger People. “Stroke rates have been declining in older people over the past 20 years — but have sharply increased in those under 55. . . . Compared with the 1995-99 period, the rate of stroke in 2010-14 increased by 147 percent in people 35 to 39, by 101 percent in people 40 to 44, by 68 percent in those 45 to 49, and by 23 percent in the 50 to 54 group.”