Interestingly some of the ceremonial work i took part in showed that 'physicallity' and even 'health' are not the only measure of personal 'strength'. I met numerous people who were very fit/strong/yoga/martial arts etc who could not keep up over a long intense ceremony - your spiritual awareness and muscles are important too.
As Seren points out the spiritual aspect of health is important and i would say as important as everything mentioned here......Mind, Body & Soul. Im not talking about religion per se. Spirituality is much too big to be contained within the walls of a cathedral, mosque or temple.
Im 48 and this mind body spirit equation is at the forefront of my menopause....actually I havent really thought much about it until I read this thread. Female menopause seems to be in the spot light the most.
I feel and I am in better shape than I ever have been due to an active surfing lifestyle and yoga practice...both of these keep the mind body spirit equation balance. Yoga tends to take the lead though as this is its purpose.....liberation form all worldly suffering and the cycle of birth & death, ultimately ending in union with the universal spirit...... Samadhi. To think some people believe yoga is just a form of excersice
That being said....what I notice most at this time of life is the past behind me and where I have come from and the untrodden path before me. What will I do with the latter part of my life?
and don't forget a happy and creative life can also make a huge difference, whatever the level of physical exercise you undertake - no point having the hardest 8 pack in the universe if you are a miserable git.