A fascinating read in this weekend's New York Times Magazine about aging and exercise:
[Muscle physiologist Tanja] Taivassalo first met [Olga] Kotelko at last year’s world outdoor masters track championships in Lahti, Finland, the pinnacle of the competitive season for older tracksters. Taivassalo went to watch her dad compete in the marathon. But she could hardly fail to notice the 91-year-old Canadian, bespandexed and elfin, who was knocking off world record after world record.Amazing stuff. Intense exercise appears to be help Kotelko keep performing at a level that (much) younger peers can't.