'Super-agers' study may reveal secrets to staying young

Mary Helen Abbott, 77, paints her lips bright pink, still smokes the occasional cigarette, keeps up on all the gossip at the retirement home and wears a short skirt to fitness class.

She giggles as the aerobics instructor shouts - "Swagger! Like you are going to meet someone famous!" - then she and a dozen seniors throw shoulders back, lift their knees high and strut around the exercise studio.

Abbott is what scientists refer to as a "super-ager," and she is taking part in a $3.2 million study that aims to uncover the secrets to staying sharp and healthy into old age.