Look at this room full of treadmills — it’s an entire world of 12-3-30s just waiting to be tapped into. | Boston Globe via Getty Images When it comes to exercise, so many people — beginners; die-hard enthusiasts; reluctant participants; and everyone in between — are searching for holy grails: workouts that involve the least amount of time and effort and offer maximum results. We live in the most scientifically advanced age of fitness. Exercise is a multibillion-dollar industry, and a lot of that money is spent on new research and development of new technology. If there were an easier way to get the benefits of a squat or a pull up without having to actually do a squat or a pull-up, you’d think we would’ve found it already. Despite the absence of a magic pill or a one-minute, low-impact total body workout that will burn fat, build muscle, and prevent all serious health problems, the industry is full of savvily marketed plans and potions, promising the world for just a little bit of time and work.…