Consider yoga. This five-thousand-year-old tradition was a countercultural pastime until the 1990s. But once researchers began finding the practice did everything44 from improve cognitive function to decrease blood pressure, the general public started to cross the chasm. As of 2015, some 36 million Americans have a regular practice.45 An activity that changes our state of mind by changing the shape of our bodies has become more popular, in terms of participation, than football.46
