Word: lumbar
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Dates: during 1990-1999
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...study showed both professional and amateur golfers generating "peak spinal compression loads" of 6,000 newtons (a measure of gravitational force). That's the equivalent of eight times an individual's standing body weight. These back-crunching levels are "close to the known failure loads associated with lumbar intervertebral joints," concludes Thomas P. Headman, a biomechanical engineer at the University of Southern California...