"Rebounding is something I believe everyone can do and it's such a powerful form of exercise. You don't have to do it very much and if you've got a rebounder in your house and children visit where are they? They're on the rebounder. I've come to the conclusion that people get old because they stop jumping and one of the old sayings Jump for Joy Jump for life, so start jumping."
January 1, 1970
https://en.wikiquote.org/wiki/Barbara_O'Neill