"When I'm riding, I don't have Parkinson's," says Smith, "because the balance issue is gone. It's just me and my muscles."
But you don't have to have a serious disease like Parkinson's to feel benefits from recumbent trikes. "For retired people who begin to question their physical ability, this is like the fountain of youth," says Santa Barbara biker Lawson. "It's like when you were a kid riding carefree around the neighborhood. That's what retirement should be."