Hoover-ball was invented, developed and perfected by White House physician Admiral Joel T. Boone to keep Hoover physically fit. It is a combination of tennis, volleyball and medicine ball. Teams of up to five people play on a court 66 feet by 30 feet with an 8 foot volleyball net. A 4 or 6 pound medicine ball is used and scoring is exactly like tennis. – History of Hoover-Ball, Hoover Association
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