They really are amazing. I usually see them in the gym on the weekends. That lady goes around talking to everybody, giving them pep talks to keep up the good work so they can live to be as old as she is. Last Sunday she came over to me and said she doesn't understand how people can expect to live a long time when they don't want to exercise. Keep moving, she says. If a weight is too heavy, pick up a lighter one, but just keep moving.