We don't know how long it will take for science and business to develop and deliver working rejuvenation therapies capable of reversing age-related damage and significantly extending our life spans. So it makes sense to take the best possible care of ourselves today - the longer you live in good health, the more likely you are to benefit from the future of medical technology. With that in mind, take a look at what the Scotsman has to say about exercise and neurodegeneration: "Middle-aged people can reduce their risk of developing dementia and Alzheimer's disease later in life by remaining physically active, according to a new study. Researchers found people who exercised at least twice a week in sessions lasting 20 minutes or more reduced their risk of developing Alzheimer's disease by 60 per cent, compared with those who did a small amount of training. The active group also lowered their odds of having dementia by 50 per cent."