Depression among the elderly is largely overlooked, but exercise can help to counter it.  Left! Clap! Right! Clap!” shouts a young woman dressed in an orange tracksuit. She stands in front of about 30 women, who follow her movements obediently to a regular beat, stepping from side to side with a chorus of echoing claps. “Now go down low!” calls the instructor over the noise in the cramped room. Giggling erupts as some women playfully protest. The instructor, a physiotherapy student at the University of the Witwatersrand, smiles broadly and says: “You’re old but you’re not dead! Come on!” ….more