In researching this topic, one may become hesitant to reach a conclusion as the type of exercise drastically alters health outcomes and even those who do the most ideal exercises may become reckless in their pursuit of gains. Having animals perform resistance training may enlighten better than observing the lifespan of Rich Piana #763, and as I understand it, there are methods that certain experimenters have used to get animals to lift weights in limited contexts, but I don't yet know if they can manage in practice to replicate anything resembling human habits.
But one can already conclude from data available that endurance training or exercise that causes catabolic states is empirically bad for your health, and short, resistance training or exercise that causes anabolic states that avoids heavy breathing as in running long distances has much better results. I would guess that some of the health benefits in lifting weights have to do with having larger, hungrier muscles that dispose of larger quantities of fat, especially polyunsaturated fat, before it can wreak havoc in more critical tissues such as the brain and thyroid and that the reason endurance running is so bad is because it triggers the chronic release of damaging free fatty acids among other things.