For most people, old age is feared because it is associated with disability and disease, and it is true that the prevalence of disease increases decade by decade. However, the ageing process is not the principal cause of disabling disease, and many of the disabling diseases of old age are preventable.
The Actual Rate of Decline is faster than the Best Possible Rate of Decline, that is the rate of decline due solely to the ageing process and the difference between the two is the Fitness Gap. Both the point at which physical decline starts, and the rate at which it proceeds is for the first few decades determined by loss of fitness, and loss of fitness is determined by social factors, namely by the decisions people make about their life and the pressures which influence them decreases
There are only two phases of life, the phase of growth and development and the phase of ageing and functional decline which is at present untreatable but there is great interest, and considerable investment, in the search for what would have been called an Elixir of Life but is now called Regenerative Medicine
The Ageing Process is normal, biological and not pathological, and nothing can be done about it, for the present at least. But this does not mean that you should despair. On the contrary, you need to understand what is happening to you and how the three processes that cause much more trouble than ageing, at least before the age of ninety can be countered, how their impact can be reduced and how many of their effects can be reversed