My whole life, I've been very goal-oriented, but for some reason, I just couldn't get ... bad at 70, how bad was I going to feel at 85?" he said. So he decided to make a change. He started by ...

At age 70, he had "excruciating" back pain so started working out ... but for some reason, I just couldn't get off the couch," he said. By age 70, he had excruciating lower back pain.