Charles Eugster was frail and decrepid at 87 years old. So he decided to start lifting weights. Within a few years he was considered by many the fittest old person on planet earth. At 96 years old he was sprinting and setting rowing records. He reversed aging up to a point where some of his white hair turned brown and he had a renewed libido: www.vice.com/en_us/article/nn9xzg/charles-eugster-fittest-oap-on-planet
He died at 97 years old. That fact saddens me. However, as you study what the guy really enjoyed in the last ten years of his life, it was incredible. He might've lived longer or shorter due to his efforts. That we will never really know for a fact. I think it's reasonable to assume he lived longer than he would've otherwise. But what we can know beyond a shadow of a doubt was that his enjoyment of life and capability in his last ten years was greater than the ten prior to that.
His story is reflective of the possibility for all people. Increasingly, there are stories of late-in-life health and fitness starters who achieve something totally remarkable. They get better. In a way, they get younger. Dr. Terry Wahls calls this phenomenon "youthening." By her measure, when people genuinely commit to strengthening and certain nutritional protocols, they can turn back the clock about 10 years before they begin to "age" again. She's a genuine medical doctor and scientific researcher who reversed her own progressive MS which had her previously wheelchair-bound. So she isn't blowing smoke.