Senior Citizens Stay Fit (November 27, 2002) In 2006, around 20 percent of Germany’s population was sixty-five or older. One sector that has benefited from longer life expectancies is the fitness industry, which has tailored its offerings to suit the needs of senior citizens. The photo shows Hildegard Hasenstab (84) and her husband, Wilhelm (82), doing strength-training exercises in a Hamburg fitness studio on November 27, 2002. Photo: Frank May.