Spend time around people who remain active into their 60s, 70s and beyond, and you start hearing the same ideas over and over. They’re not complicated or trendy, but they sure do work. Here are 10 lessons from folks who age well and stay active, maintaining health, energy, and independence through exercise. 1. Don’t wait for life to be perfect Barbara Warren kept competing in track events while waiting for knee replacement surgery. She sometimes finished last. She was still m