Wow. Intense training can help you fight off aging, but there possibly some genetic component as well. But the fact that she didn't begin her intense training until her 70s leaves me with some hope. I can start now and have some hope of holding on.
"Only children are happier than those with siblings, which may reflect the fact that they endure less bullying — something more than half of kids with siblings in the study reported. "Quarreling siblings increase stress for parents and some [parents] just give up intervening or intervene inconsistently, leaving the field wide open for the bully sibling," says one researcher."