10 Innovations That Changed the Way We Exercise

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Bicycle Gears

When the 10-speed bicycle came to the U.S. from Europe with its additional options, increased ease of use and streamlined design that reduced drag and added speed, baby boomers fell in love. By the early 1970s, a full-on bicycle craze had begun and manufacturers like Schwinn were facing shortages. "I remember all of a sudden, everybody seemed to want a 10-speed bike," says Todd. Suddenly, biking wasn't just for kids. The 1980s would bring the modern stationary bike, an update of the crank-operated Gymnasticon of the late 18th century. Countless sweaty Spinning classes would follow.