Exercise, from a public health perspective, is an unmitigated failure. The world's longest-lived people live in environments that nudge them into more movement. They don't use power tools, they do their own yard work, they grow a garden.
Diet and supplements and exercise programs aren't what is achieving longevity. Having a faith-based community can add four to 14 years.
Actually, when you get into your sixties and above, you want to think about exercise differently. It's not just about you know cardiovascular or lifting weights. It's also about avoiding accidents.