Bruce Cazenave, a former chief operating officer of Timberland Europe and president and chief executive of Dorel Juvenile Group, has become chief executive of Nautilus. At the same time, Carl Johnson, a former top executive of Campbell Soup and Kraft Foods, has been named non-executive chairman of the recently reorganized American fitness equipment companies. They both replace Edward J. Bramson, who resigned as CEO and as a director of the company last May 26. Another member of the board, Craig L. McKibben, chief financial officer of Sherborne Investors, has also resigned.