Longevity is determined by many reasons, including genes, living environment and living rules. Even mentality can affect people's life span. It can't be said that people who keep exercising will live longer. From some existing studies, it can be proved that many people with strong muscles will live much longer than some thin or obese people in the experiment.
Those centenarians can live a long life, because they are like turtles, they will live a long life if they do nothing. Their exercise is actually not low. Many long-lived old people are in the countryside. In fact, their daily workload of farm work is really higher than that of young people in the city, which is equivalent to a fitness training. As for those longevity elders, why are their muscles underdeveloped?
This problem is very complicated, not to mention that the old people in China, even Schwarzenegger, will still exercise regularly when they are old, but their muscle content is far from that when they were young, and the developed muscles are not so tight. With the growth of age, all aspects of the body function will show a downward trend, and the efficiency of muscle gain will definitely be slower. In addition, the digestive system of the elderly is not good, and they can't eat high-protein food, even if they have a good one.
Although fitness has not been proved to prolong life, people with fitness habits will age more slowly than some ordinary people, because people with long-term fitness training will have tighter skin and look younger, just like a machine. If you use it frequently, it will definitely look new, but if you don't use it for a long time, it will rust faster. This is a fact.