Back in the late 1980s, the entire business world was obsessed with Japan. It's no wonder that this was the case: here was a country which had emerged from the ashes of World War 2 and had become the world's second-largest economy. They made high-quality cars, consumer electronics, semiconductors, plus they seemed to have a management style and work ethic that put the "good old USA" to shame.
As might be expected, a flood of books came out to instruct the business people of America how to best ape their Japanese betters. This fixation reached a fever pitch when American companies started hauling in their workers in the morning to do calisthenics, because if that's what the Japanese are doing, well by gum, that must be the secret: calisthenics. In the morning.