Join a fitness program at your local senior center or YMCA. Researchers studied more than 400 older adults who took part in a community center’s hour-long physical activity program, which combined flexibility training, low-impact aerobics, and resistance training. After 10 weeks, they found, people who had followed the program were more fit and more likely to keep working out than those who hadn’t.
Source: American Journal of Public Health, February 2009